Deuteronomy 15:11-18

For the poor will never cease out of the land: therefore I command thee, saying, Thou shalt surely open thy hand unto thy brother, to thy needy, and to thy poor, in thy land. If thy brother, a Hebrew man, or a Hebrew woman, be sold unto thee, and serve thee six years; then in the seventh year thou shalt let him go free from thee. And when thou lettest him go free from thee, thou shalt not let him go empty: thou shalt furnish him liberally out of thy flock, and out of thy threshing-floor, and out of thy winepress; as Jehovah thy God hath blessed thee thou shalt give unto him. And thou shalt remember that thou wast a bondman in the land of Egypt, and Jehovah thy God redeemed thee: therefore I command thee this thing to-day. And it shall be, if he say unto thee, I will not go out from thee; because he loveth thee and thy house, because he is well with thee; then thou shalt take an awl, and thrust it through his ear unto the door, and he shall be thy servant for ever. And also unto thy maid-servant thou shalt do likewise. It shall not seem hard unto thee, when thou lettest him go free from thee; for to the double of the hire of a hireling hath he served thee six years: and Jehovah thy God will bless thee in all that thou doest.