Exodus 21:7-9

7And if a man shall sell his daughter as a handmaid, she shall not go out as the bondmen go out.

8If she is unacceptable in the eyes of her master, who had taken her for himself, then shall he let her be ransomed: to sell her unto a foreign people he hath no power, after having dealt unfaithfully with her.

9And if he have appointed her unto his son, he shall deal with her after the law of daughters.