Exodus 13:4-5

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.