Leviticus 24:18-20

¹⁸And whosoever shall smite a beast, and it shall die, let him render life for life.

¹⁹And whosoever shall inflict a blemish on his neighbour, as he has done to him, so shall it be done to himself in return;

²⁰bruise for bruise, eye for eye, tooth for tooth: as any one may inflict a blemish on a man, so shall it be rendered to him.