Deuteronomy 15:17-19

New Catholic Bible

¹⁷ then take an awl and push it through his ear lobe into the door. He will then be your slave forever. You are to do the same with your maidservants as well. ¹⁸ Do not consider it to be a hardship to set your slave free. You received twice as much from him in the six years as you would have from a hired hand, and the Lord, your God, will bless you in all of your undertakings.

¹⁹ The Firstborn. Set apart for the Lord, your God, the firstborn male from your herds and your flocks. Do not set the firstborn of your oxen to work, nor shear the firstborn of your sheep.