Deuteronomy 15:12

“And if thy brother, an Hebrew man, or an Hebrew woman, be sold unto thee, etc.] By others, as by the sanhedrim for theft, for which a man might be sold, but not a woman, as Jarchi observes; but then a father might sell his daughter for an handmaid, if little and under age; and to such cases this law is supposed to refer; (see <022102>Exodus 21:2,7 22:3) though a man on account of poverty might sell himself: and serve thee six years; as he was bound to do, if his master lived so long; if he died before the six years were out, he was obliged to serve his son, but not his daughter, nor his brother, nor his heirs, as the Jewish writers affirm f167: then in the seventh year thou shalt let him go…”

“HEBREW SERVANTS' FREEDOM. (Deu 15:12-19) 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 (Lev 25:39; Kg2 4:1; Neh 5:1-13; Job 24:9; Mat 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 Lev 25:39].”

“If thy brother be sold - Either by himself, or his parents, or as a criminal. Six years - To be computed from the beginning of his servitude, which is every where limited to the space of six years. Deuteronomy 15:15”

“15:12 If a fellow Hebrew sells himself or herself to be your servant: This arrangement allowed a debtor to work off financial obligations to a creditor. The limit of this arrangement was seven years (but see 15:16-17).”

“Deu 15:1; Exo 21:2-6; Lev 25:39-41; Jer 34:14; Joh 8:35, Joh 8:36 Deuteronomy 15:13”

“These provisions in favour of the poor are followed very naturally by the rules which the Israelites were to be urged to observe with reference to the manumission of Hebrew slaves. It is not the reference to the sabbatical year in the foregoing precepts which forms the introduction to the laws which follow respecting the manumission of Hebrews who had become slaves, but the poverty and want which compelled Hebrew men and women to sell themselves as slaves. The seventh year, in which they were to be set free, is not the same as the sabbatical year, therefore, but the seventh year of bondage. Manumission in the seventh year of service had already been commanded in Exo 21:2-6, in the rights…”