Exodus 21:9

6 then his master shall bring him to God, and he shall bring him to the door or the doorpost. And his master shall bore his ear through with an awl, and he shall be his slave forever.

7 “When a man sells his daughter as a slave, she shall not go out as the male slaves do. 8 If she does not please her master, who has designated her for himself, then he shall let her be redeemed. He shall have no right to sell her to a foreign people, since he has broken faith with her. 9 If he designates her for his son, he shall deal with her as with a daughter. 10 If he takes another wife to himself, he shall not diminish her food, her clothing, or her marital rights. 11 And if he does not do these three things for her, she shall go out for nothing, without payment of money.

12 “Whoever strikes a man so that he dies shall be put to death.