Exodus 21:2-7

2If thou buy an Hebrew servant, six years he shall serve: and in the seventh he shall go out free for nothing.

3If he come in by himself, he shall go out by himself: if he be married, then his wife shall go out with him.

4If his master give him a wife, and she bear him sons or daughters; the wife and her children shall be her master’s, and he shall go out by himself.

5But if the servant shall plainly say, I love my master, my wife, and my children; I will not go out free:

6then his master shall bring him unto God, and shall bring him to the door, or unto the door post; and his master shall bore his ear through with an awl; and he shall serve him for ever.

7And if a man sell his daughter to be a maidservant, she shall not go out as the menservants do.