Numbers 35:29

²⁷and the avenger of blood should find him without the bounds of the city of his refuge, and the avenger of blood should kill the slayer, he is not guilty.

²⁸For he ought to have remained in the city of refuge till the high priest died; and after the death of the high priest the slayer shall return to the land of his possession.

— Numbers 35:29 —

³⁰Whoever kills a man, thou shalt slay the murderer on the testimony of witnesses; and one witness shall not testify against a soul that he should die.

³¹And ye shall not accept ransoms for life from a murderer who is worthy of death, for he shall be surely put to death.