Numbers 35:30-32

New International Version - UK

³⁰ ‘“Anyone who kills a person is to be put to death as a murderer only on the testimony of witnesses. But no one is to be put to death on the testimony of only one witness.

³¹ ‘“Do not accept a ransom for the life of a murderer, who deserves to die. They are to be put to death.

³² ‘“Do not accept a ransom for anyone who has fled to a city of refuge and so allow them to go back and live on their own land before the death of the high priest.