Israel: The Day of Their Deliverance to be a Memorial
Source: Nav
Exodus 12:42
Because the LORD kept a vigil that night to bring them out of the land of Egypt, this same night is to be a vigil to the LORD, to be observed by all the Israelites for the generations to come.
Exodus 13:3–16
So Moses told the people, “Remember this day, the day you came out of Egypt, out of the house of slavery; for the LORD brought you out of it by the strength of His hand. And nothing leavened shall be eaten. / Today, in the month of Abib, you are leaving. / And when the LORD brings you into the land of the Canaanites, Hittites, Amorites, Hivites, and Jebusites—the land He swore to your fathers that He would give you, a land flowing with milk and honey—you shall keep this service in this month.