Deuteronomy 15:16

15:16 However, if the servant says to you, “I do not want to leave you,” because he loves you and your household, since he is well off with you,

Deuteronomy 32:36

32:36 The Lord will judge his people,

and will change his plans concerning his servants;

when he sees that their power has disappeared,

and that no one is left, whether confined or set free.