23 But if a serious injury results, then you must require a life for a life—
Exodus 21:23 Cross References - BSB
Leviticus 24:19
19 If anyone injures his neighbor, whatever he has done must be done to him:
Numbers 35:31
31 You are not to accept a ransom for the life of a murderer who deserves to die; he must surely be put to death.
Deuteronomy 19:21
21 You must show no pity: life for life, eye for eye, tooth for tooth, hand for hand, and foot for foot.