"And it shall be, when the LORD brings you into the land of the Canaanites, as He swore to you and your fathers, and gives it to you,
Exodus 13:11
Surrounding context
13:10 You shall therefore keep this ordinance in its season from year to year.
13:11 "And it shall be, when the LORD brings you into the land of the Canaanites, as He swore to you and your fathers, and gives it to you,
13:12 that you shall set apart to the LORD all that open the womb, that is, every firstborn that comes from an animal which you have; the males shall be the LORD's.