Numbers 35:30-33

30“Whoever kills another person will be put to death as a murderer only on the testimony of more than one witness. No one can be put to death on the testimony of only one witness.

31“Never accept a cash payment in exchange for the life of a convicted murderer who has been given the death penalty. Murderers must be put to death.

32“An accused murderer who has fled to a city of refuge must never go back and live on his own land before the death of the high priest. Don’t accept a cash payment to allow him to do this.

33“You must not pollute the land where you live. Murder is what pollutes the land. The land where a murder was committed can never make peace with the Lord except through the death of the murderer.