Numbers 35:12-19

12They will be places of refuge from the avenger, so that anyone accused of murder may not die before they stand trial before the assembly.

13These six towns you give will be your cities of refuge.

14Give three on this side of the Jordan and three in Canaan as cities of refuge.

15These six towns will be a place of refuge for Israelites and for foreigners residing among them, so that anyone who has killed another accidentally can flee there.

16“ ‘If anyone strikes someone a fatal blow with an iron object, that person is a murderer; the murderer is to be put to death.

17Or if anyone is holding a stone and strikes someone a fatal blow with it, that person is a murderer; the murderer is to be put to death.

18Or if anyone is holding a wooden object and strikes someone a fatal blow with it, that person is a murderer; the murderer is to be put to death.

19The avenger of blood shall put the murderer to death; when the avenger comes upon the murderer, the avenger shall put the murderer to death.