Exodus 21:2

Hebrew Servants

21:2 “If you buy a Hebrew servant, he is to serve you for six years, but in the seventh year he will go out free without paying anything.

Exodus 21:6

21:6 then his master must bring him to the judges, and he will bring him to the door or the doorposts, and his master will pierce his ear with an awl, and he shall serve him forever.