“You shall therefore keep this ordinance in its season from year to year.”
Exodus 13:10 (WEB)
Context Reading
8You shall tell your son in that day, saying, ‘It is because of that which Yahweh did for me when I came out of Egypt.’ 9It shall be for a sign to you on your hand, and for a memorial between your eyes, that Yahweh’s law may be in your mouth; for with a strong hand Yahweh has brought you out of Egypt. 10You shall therefore keep this ordinance in its season from year to year. 11“It shall be, when Yahweh brings you into the land of the Canaanite, as he swore to you and to your fathers, and will give it to you, 12that you shall set apart to Yahweh all that opens the womb, and every firstborn that comes from an animal which you have. The males shall be Yahweh’s.