Exodus 21:2-6

2If thou buy a Hebrew bondman, six years shall he serve; and in the seventh he shall go out free for nothing.

3If he came in alone, he shall go out alone: if he had a wife, then his wife shall go out with him.

4If his master have given him a wife, and she have borne him sons or daughters, the wife and her children shall be her master's, and he shall go out alone.

5But if the bondman shall say distinctly, I love my master, my wife, and my children, I will not go free;

6then his master shall bring him before the judges, and shall bring him to the door, or to the door-post; and his master shall bore his ear through with an awl; and he shall be his bondman for ever.