Exodus 13:10
You must follow these rules every year at this time.
Exodus 12:14
This day will be a memorial to you. You shall celebrate it as a feast to Jehovah. You are to celebrate it as a permanent ordinance throughout your generations.
Exodus 12:24-25
You shall observe this event as an ordinance for you and your children from generation to generation.
Exodus 23:15
In the month of Abib, the month in which you left Egypt, celebrate the Festival of Unleavened Bread in the way that I commanded you. Do not eat any bread made with yeast during the seven days of this festival. Never come to worship me without bringing an offering.
Leviticus 23:6
The fifteenth day of the same month the Festival of Unleavened Bread begins. You must not eat any bread made with yeast for seven days.
Deuteronomy 16:3-4
Do not eat leavened bread with it. Eat unleavened bread for seven days. It is the bread of affliction. You should remember all the days of your life the day when you came out of the land of Egypt in haste.