Numbers 35:12, 21, 24, 27

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

or if out of enmity one person hits another with their fist so that the other dies, that person is to be put to death; that person is a murderer. The avenger of blood shall put the murderer to death when they meet.

the assembly must judge between the accused and the avenger of blood according to these regulations.

and the avenger of blood finds them outside the city, the avenger of blood may kill the accused without being guilty of murder.