Cities of refuge were allocated in the Law of Moses for use in the event of accidental homicide.
Numbers 35:11 Then ye shall appoint you cities to be cities of refuge for you; that the slayer may flee thither, which killeth any person at unawares. 12 And they shall be unto you cities for refuge from the avenger; that the manslayer die not, until he stand before the congregation in judgment. 13 And of these cities which ye shall give six cities shall ye have for refuge. 14 Ye shall give three cities on this side Jordan, and three cities shall ye give in the land of Canaan, which shall be cities of refuge. 15 These six cities shall be a refuge, both for the children of Israel, and for the stranger, and for the sojourner among them: that every one that killeth any person unawares may flee thither. 16 And if he smite him with an instrument of iron, so that he die, he is a murderer: the murderer shall surely be put to death. 17 And if he smite him with throwing a stone, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death. 18 Or if he smite him with an hand weapon of wood, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death. 19 The revenger of blood himself shall slay the murderer: when he meeteth him, he shall slay him. 20 But if he thrust him of hatred, or hurl at him by laying of wait, that he die; 21 Or in enmity smite him with his hand, that he die: he that smote him shall surely be put to death; for he is a murderer: the revenger of blood shall slay the murderer, when he meeteth him. 22 But if he thrust him suddenly without enmity, or have cast upon him any thing without laying of wait, 23 Or with any stone, wherewith a man may die, seeing him not, and cast it upon him, that he die, and was not his enemy, neither sought his harm: 24 Then the congregation shall judge between the slayer and the revenger of blood according to these judgments: 25 And the congregation shall deliver the slayer out of the hand of the revenger of blood, and the congregation shall restore him to the city of his refuge, whither he was fled: and he shall abide in it unto the death of the high priest, which was anointed with the holy oil. 26 But if the slayer shall at any time come without the border of the city of his refuge, whither he was fled; 27 And the revenger of blood find him without the borders of the city of his refuge, and the revenger of blood kill the slayer; he shall not be guilty of blood: 28 Because he should have remained in the city of his refuge until the death of the high priest: but after the death of the high priest the slayer shall return into the land of his possession. 29 So these things shall be for a statute of judgment unto you throughout your generations in all your dwellings. 30 Whoso killeth any person, the murderer shall be put to death by the mouth of witnesses: but one witness shall not testify against any person to cause him to die. 31 Moreover ye shall take no satisfaction for the life of a murderer, which is guilty of death: but he shall be surely put to death. 32 And ye shall take no satisfaction for him that is fled to the city of his refuge, that he should come again to dwell in the land, until the death of the priest. 33 So ye shall not pollute the land wherein ye are: for blood it defileth the land: and the land cannot be cleansed of the blood that is shed therein, but by the blood of him that shed it. 34 Defile not therefore the land which ye shall inhabit, wherein I dwell: for I the LORD dwell among the children of Israel.
Deuteronomy 19:2 Thou shalt separate three cities for thee in the midst of thy land, which the LORD thy God giveth thee to possess it. 3 Thou shalt prepare thee a way, and divide the coasts of thy land, which the LORD thy God giveth thee to inherit, into three parts, that every slayer may flee thither. 4 And this is the case of the slayer, which shall flee thither, that he may live: Whoso killeth his neighbour ignorantly, whom he hated not in time past; 5 As when a man goeth into the wood with his neighbour to hew wood, and his hand fetcheth a stroke with the axe to cut down the tree, and the head slippeth from the helve, and lighteth upon his neighbour, that he die; he shall flee unto one of those cities, and live: 6 Lest the avenger of the blood pursue the slayer, while his heart is hot, and overtake him, because the way is long, and slay him; whereas he was not worthy of death, inasmuch as he hated him not in time past. 7 Wherefore I command thee, saying, Thou shalt separate three cities for thee. 8 And if the LORD thy God enlarge thy coast, as he hath sworn unto thy fathers, and give thee all the land which he promised to give unto thy fathers; 9 If thou shalt keep all these commandments to do them, which I command thee this day, to love the LORD thy God, and to walk ever in his ways; then shalt thou add three cities more for thee, beside these three: 10 That innocent blood be not shed in thy land, which the LORD thy God giveth thee for an inheritance, and so blood be upon thee. 11 But if any man hate his neighbour, and lie in wait for him, and rise up against him, and smite him mortally that he die, and fleeth into one of these cities: 12 Then the elders of his city shall send and fetch him thence, and deliver him into the hand of the avenger of blood, that he may die. 13 Thine eye shall not pity him, but thou shalt put away the guilt of innocent blood from Israel, that it may go well with thee.
Numbers 35:6 And among the cities which ye shall give unto the Levites there shall be six cities for refuge, which ye shall appoint for the manslayer, that he may flee thither: and to them ye shall add forty and two cities.
Numbers 35:11 Then ye shall appoint you cities to be cities of refuge for you; that the slayer may flee thither, which killeth any person at unawares. 12 And they shall be unto you cities for refuge from the avenger; that the manslayer die not, until he stand before the congregation in judgment. 13 And of these cities which ye shall give six cities shall ye have for refuge. 14 Ye shall give three cities on this side Jordan, and three cities shall ye give in the land of Canaan, which shall be cities of refuge. 15 These six cities shall be a refuge, both for the children of Israel, and for the stranger, and for the sojourner among them: that every one that killeth any person unawares may flee thither. 16 And if he smite him with an instrument of iron, so that he die, he is a murderer: the murderer shall surely be put to death. 17 And if he smite him with throwing a stone, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death. 18 Or if he smite him with an hand weapon of wood, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death. 19 The revenger of blood himself shall slay the murderer: when he meeteth him, he shall slay him. 20 But if he thrust him of hatred, or hurl at him by laying of wait, that he die; 21 Or in enmity smite him with his hand, that he die: he that smote him shall surely be put to death; for he is a murderer: the revenger of blood shall slay the murderer, when he meeteth him. 22 But if he thrust him suddenly without enmity, or have cast upon him any thing without laying of wait, 23 Or with any stone, wherewith a man may die, seeing him not, and cast it upon him, that he die, and was not his enemy, neither sought his harm: 24 Then the congregation shall judge between the slayer and the revenger of blood according to these judgments: 25 And the congregation shall deliver the slayer out of the hand of the revenger of blood, and the congregation shall restore him to the city of his refuge, whither he was fled: and he shall abide in it unto the death of the high priest, which was anointed with the holy oil. 26 But if the slayer shall at any time come without the border of the city of his refuge, whither he was fled; 27 And the revenger of blood find him without the borders of the city of his refuge, and the revenger of blood kill the slayer; he shall not be guilty of blood: 28 Because he should have remained in the city of his refuge until the death of the high priest: but after the death of the high priest the slayer shall return into the land of his possession. 29 So these things shall be for a statute of judgment unto you throughout your generations in all your dwellings. 30 Whoso killeth any person, the murderer shall be put to death by the mouth of witnesses: but one witness shall not testify against any person to cause him to die. 31 Moreover ye shall take no satisfaction for the life of a murderer, which is guilty of death: but he shall be surely put to death. 32 And ye shall take no satisfaction for him that is fled to the city of his refuge, that he should come again to dwell in the land, until the death of the priest. 33 So ye shall not pollute the land wherein ye are: for blood it defileth the land: and the land cannot be cleansed of the blood that is shed therein, but by the blood of him that shed it. 34 Defile not therefore the land which ye shall inhabit, wherein I dwell: for I the LORD dwell among the children of Israel.
There was no police force. In the case of murder, the nearest kinsman of a murdered person had the right and duty of avenging the blood that had been shed by killing the perpetrator. Cities of refuge gave refuge to the accidental slayer from the revenger of blood. The Levite elders in the city were to judge the case and if satisfied that it was indeed an accident, permit the slayer to live safely within the walls of the city. The slayer was to remain within the walls until the death of the High priest, at which point he/she was permitted to return home.
Joshua 20:2 Speak to the children of Israel, saying, Appoint out for you cities of refuge, whereof I spake unto you by the hand of Moses: 3 That the slayer that killeth any person unawares and unwittingly may flee thither: and they shall be your refuge from the avenger of blood. 4 And when he that doth flee unto one of those cities shall stand at the entering of the gate of the city, and shall declare his cause in the ears of the elders of that city, they shall take him into the city unto them, and give him a place, that he may dwell among them. 5 And if the avenger of blood pursue after him, then they shall not deliver the slayer up into his hand; because he smote his neighbour unwittingly, and hated him not beforetime. 6 And he shall dwell in that city, until he stand before the congregation for judgment, and until the death of the high priest that shall be in those days: then shall the slayer return, and come unto his own city, and unto his own house, unto the city from whence he fled.
Three Levitical cities on each side of Jordan were allocated.
7 And they appointed Kedesh in Galilee in mount Naphtali, and Shechem in mount Ephraim, and Kirjatharba, which is Hebron, in the mountain of Judah. 8 And on the other side Jordan by Jericho eastward, they assigned Bezer in the wilderness upon the plain out of the tribe of Reuben, and Ramoth in Gilead out of the tribe of Gad, and Golan in Bashan out of the tribe of Manasseh. 9 These were the cities appointed for all the children of Israel, and for the stranger that sojourneth among them, that whosoever killeth any person at unawares might flee thither, and not die by the hand of the avenger of blood, until he stood before the congregation.
A number of psalms speak of God as a refuge.
For example:
Psalm 9:9 The LORD also will be a refuge for the oppressed, a refuge in times of trouble.
The writer to the Hebrews uses the metaphor of fleeing for refuge.
Hebrews 6:18 That by two immutable things, in which it was impossible for God to lie, we might have a strong consolation, who have fled for refuge to lay hold upon the hope set before us:
I hope you find this helpful.
God bless,
Glenn