Exodus 13:3-5

Moses said to the people, “Remember [solemnly observe and commemorate] this day on which you came out of Egypt, out of the house of bondage and slavery; for by a strong and powerful hand the LORD brought you out of this place. And nothing leavened shall be eaten. On this day in the month Abib, you are about to go onward. And it shall be when the LORD brings you into the land of the Canaanite, the Hittite, the Amorite, the Hivite, and the Jebusite, which He swore to your fathers to give you, a land [of abundance] flowing with milk and honey, that you shall keep and observe this rite (service) in this month.