The Feast of the Passover: To Commemorate The: Deliverance of Israel from Bondage of Egypt
Source: TTT
Exodus 12:17, 42
So you are to keep the Feast of Unleavened Bread, for on this very day I brought your divisions out of the land of Egypt. You must keep this day as a permanent statute for the generations to come. / 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 13:9
It shall be a sign for you on your hand and a reminder on your forehead that the Law of the LORD is to be on your lips. For with a mighty hand the LORD brought you out of Egypt.
Deuteronomy 16:3
You must not eat leavened bread with it; for seven days you are to eat with it unleavened bread, the bread of affliction, because you left the land of Egypt in haste—so that you may remember for the rest of your life the day you left the land of Egypt.