Cross reference
Exodus 21:23
23 And if any mischief follow, then thou shalt give life for life,
Deuteronomy 19:21
21 And thine eye shall not pity; but life shall go for life, eye for eye, tooth for tooth, hand for hand, foot for foot.
Leviticus 24:19
19 And if a man cause a blemish in his neighbor; as he hath done, so shall it be done to him;
Numbers 35:31
31 Moreover ye shall take no satisfaction for the life of a murderer, which is guilty of death: but he shall be surely put to death.