Deuteronomy 15:12

And if thy brother, an Hebrew man, or an Hebrew woman, be sold
unto thee
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 ( Exodus 21:2 Exodus 21:7 ) ( 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 ^F7: then in the seventh year thou shalt let him go free from thee; that is, at the end of the sixth, and beginning of the seventh year; see ( Exodus 21:2 ) .