Numbers 35:19–27

¹⁹The avenger of blood himself is to kill the murderer; when he finds him, he is to kill him.^{a 20}Likewise, if anyone in hatred pushes a person or throws an object at him with malicious intent and he dies, ²¹or if in hostility he strikes him with his hand and he dies, the one who struck him must be put to death; he is a murderer. The avenger of blood is to kill the murderer when he finds him.

²²“But if anyone suddenly pushes a person without hostility or throws any object at him without malicious intent ²³or without looking drops a stone that could kill a person and he dies, but he was not his enemy and didn’t intend to harm him, ²⁴the assembly is to judge between the person who kills someone and the avenger of blood according to these ordinances. ²⁵The assembly is to protect the one who kills someone from the avenger of blood. Then the assembly will return him to the city of refuge he fled to, and he must live there until the death of the high priest who was anointed with the holy oil.^b

²⁶“If the one who kills someone ever goes outside the border of the city of refuge he fled to, ²⁷and the avenger of blood finds him outside the border of his city of refuge and kills him, the avenger will not be guilty of bloodshed,