Leviticus 24:17-23 - An Eye For An Eye
17 "If a man beats a human being to death, he is certainly to be executed, 18 but whoever beats an animal to death is to replace it life for life. 19 If a man disfigures his fellow, whatever he did is to be done to him also. 20 Fracture for fracture, eye for eye, tooth for tooth just as he had caused a disfigurement against another man, so it is to be done against him. 21 Whoever beats an animal to death is to replace it, but whoever beats a human being to death is to be put to death. 22 You are to have for yourselves consistent procedures in deciding a case. As it is for the resident alien, so it is for the native born. I am the LORD your God."
23 So Moses spoke to the Israelis and they brought the one who cursed outside the camp and stoned him to death with boulders. The Israelis did just as the LORD had commanded Moses.