Exodus 13:10-12

New Revised Standard Version Catholic Edition

¹⁰ You shall keep this ordinance at its proper time from year to year.

The Consecration of the Firstborn

¹¹ “When the Lord has brought you into the land of the Canaanites, as he swore to you and your ancestors, and has given it to you, ¹² you shall set apart to the Lord all that first opens the womb. All the firstborn of your livestock that are males shall be the Lord’s.