Cross reference
Exodus 21:23
23 and if there is mischief, then thou hast given life for life,
Deuteronomy 19:21
21 and thine eye doth not pity -- life for life, eye for eye, tooth for tooth, hand for hand, foot for foot.
Leviticus 24:19
19 `And when a man putteth a blemish in his fellow, as he hath done so it is done to him;
Numbers 35:31
31 `And ye take no atonement for the life of a murderer who `is' condemned -- to die, for he is certainly put to death;