Deuteronomy 15:12-18

12And if thy brother, an Hebrew man, or an Hebrew woman, shall be sold to thee, and serve thee six years; then in the seventh year thou shalt let him go free from thee. 13And when thou sendest him out free from thee, thou shalt not let him depart empty: 14Thou shalt furnish him liberally out of thy flock, and out of thy floor, and out of thy winepress: of that which the LORD thy God hath blessed thee thou shalt give to him. 15And thou shalt remember that thou wast a slave in the land of Egypt, and the LORD thy God redeemed thee: therefore I command thee this thing this day. 16And it shall be, if he shall say to thee, I will not leave thee; because he loveth thee and thy house, because he is well with thee; 17Then thou shalt take an awl, and thrust it through his ear into the door, and he shall be thy servant for ever. And also to thy maidservant thou shalt do likewise. 18It shall not seem hard to thee, when thou sendest him away free from thee; for he hath been of double the worth of a hired servant to thee, in serving thee six years: and the LORD thy God shall bless thee in all that thou doest.