An eye
Exodus 21:22-27
22
"When men strive together, and hurt a woman with child, so that there is a miscarriage, and yet no harm follows, the one who hurt her shall be fined, according as the woman's husband shall lay upon him; and he shall pay as the judges determine.
23
If any harm follows, then you shall give life for life,
24
eye for eye, tooth for tooth, hand for hand, foot for foot,
25
burn for burn, wound for wound, stripe for stripe.
26
"When a man strikes the eye of his slave, male or female, and destroys it, he shall let the slave go free for the eye's sake.
27
If he knocks out the tooth of his slave, male or female, he shall let the slave go free for the tooth's sake.
Leviticus 24:19
When a man causes a disfigurement in his neighbor, as he has done it shall be done to him,
Leviticus 24:20
fracture for fracture, eye for eye, tooth for tooth; as he has disfigured a man, he shall be disfigured.
Deuteronomy 19:19
then you shall do to him as he had meant to do to his brother; so you shall purge the evil from the midst of you.