12. if thy brother, an Hebrew man, or an Hebrew woman, be sold unto thee—The last extremity of an insolvent debtor, when his house or land was not sufficient to cancel his debt, was to be sold as a slave with his family (Le 25:39; 2Ki 4:1; Ne 5:1-13; Job 24:9; Mt 18:25). The term of servitude could not last beyond six years. They obtained their freedom either after six years from the time of their sale or before the end of the seventh year. At the year of jubilee, such slaves were emancipated even if their six years of service were not completed [see on Le 25:39].

     13-15. thou shalt not let him go away empty—A seasonable and wise provision for enabling a poor unfortunate to regain his original status in society, and the motive urged for his kindness and humanity to the Hebrew slave was the remembrance that the whole nation was once a degraded and persecuted band of helots in Egypt. Thus, kindness towards their slaves, unparalleled elsewhere in those days, was inculcated by the Mosaic law; and in all their conduct towards persons in that reduced condition, leniency and gentleness were enforced by an appeal which no Israelite could resist.

     16, 17. if he say unto thee, I will not go away from thee—If they declined to avail themselves of the privilege of release and chose to remain with their master, then by a peculiar form of ceremony they became a party to the transaction, voluntarily sold themselves to their employer, and continued in his service till death.

     18. he hath been worth a double hired servant to thee—that is, he is entitled to double wages because his service was more advantageous to you, being both without wages and for a length of time, whereas hired servants were engaged yearly (Le 25:53), or at most for three years (Isa 16:14).

     19. All the firstling males of thy herd and of thy flock thou shalt sanctify unto the Lord thy God—[See on Ex 13:2]; see Ex 22:30).