Numbers 35:28-30

Modern English Version

²⁸ because the manslayer 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 manslayer may return to the land of his possession.

²⁹ So these things will be for a statute of judgment to you throughout your generations in all your dwelling places.

³⁰ Whoever kills a person, the murderer will be put to death by the testimony of witnesses, but one witness will not testify against a person for death.