Exodus 13:3-5

3Then Moses said to the people, "Remember this day in which you came out from Egypt, out of the house of slavery, for by a strong hand the Lord brought you out from this place. No leavened bread shall be eaten.

4Today, in the month of Abib, you are going out.

5And when the Lord brings you into the land of the Canaanites, the Hittites, the Amorites, the Hivites, and the Jebusites, which he swore to your fathers to give you, a land flowing with milk and honey, you shall keep this service in this month.