The Law of the Lord - Seven Days of Unleavened Bread

Seven days you shall eat unleavened bread. On the seventh day, there shall be a feast to the lord. Every firstling of a donkey, you shall redeem with a lamb. Or if you will not redeem it, you shall break its neck. You shall therefore keep this ordinance at its appointed time, from year to year. And when the lord brings you into the land of the canaanites, as he swore to you and to your fathers, and shall give it to you, you shall set apart to the lord all the first that opens the womb.