利未记 25:39

עבדת עבד [THOU SHALT NOT COMPEL HIM] TO SERVE AS A BOND-SERVANT — i. e. thou shalt not make him do degrading work by which he is recognised as a slave — this might come out that he shall not, for instance, carry his (the master’s) clothes after him to the public baths nor help him on with his boots (cf. Sifra, Behar, Chapter 7 2).

וְכִֽי־יָמ֥וּךְ אָחִ֛יךָ עִמָּ֖ךְ וְנִמְכַּר־לָ֑ךְ לֹא־תַעֲבֹ֥ד בּ֖וֹ עֲבֹ֥דַת עָֽבֶד׃

And if thy brother who dwells by thee be grown poor, and be sold to thee; thou shalt not compel him to serve as a bondservant: