Deuteronomy 15:16-18

New International Version - UK

¹⁶ But if your servant says to you, ‘I do not want to leave you,’ because he loves you and your family and is well off with you, ¹⁷ then take an awl and push it through his ear lobe into the door, and he will become your servant for life. Do the same for your female servant.

¹⁸ Do not consider it a hardship to set your servant free, because their service to you these six years has been worth twice as much as that of a hired hand. And the Lord your God will bless you in everything you do.