Cross reference
Exodus 21:23
23 But if damage comes to her, let life be given in payment for life,
Deuteronomy 19:21
21 Have no pity; let life be given for life, eye for eye, tooth for tooth, hand for hand, foot for foot.
Leviticus 24:19
19 And if a man does damage to his neighbour, as he has done, so let it be done to him;
Numbers 35:31
31 Further, no price may be given for the life of one who has taken life and whose right reward is death: he is certainly to be put to death.