Numbers 35:28-30

Revised Standard Version

²⁸ For the man must remain in his city of 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 “And these things shall be for a statute and ordinance to you throughout your generations in all your dwellings. ³⁰ If any one kills a person, the murderer shall be put to death on the evidence of witnesses; but no person shall be put to death on the testimony of one witness.