Exodus 13:10
And you will keep this statute at its appointed time {from year to year}.
Exodus 12:14
"And this day will become a memorial for you, and you will celebrate it as a religious feast for Yahweh throughout your generations; you will celebrate it as a lasting statute.
Exodus 12:24-25
"And you will keep this event as a rule for you and for your children forever.
Exodus 23:15
You will keep the Feast of Unleavened Bread; for seven days you will eat unleavened bread, as I commanded you at [the] appointed time, the month of Abib, because in it you came out from Egypt, and {no one will} appear before me empty-handed.
Leviticus 23:6
And on the fifteenth day of this month [is] Yahweh's Feast of Unleavened Bread; [for] seven days you shall eat unleavened bread.
Deuteronomy 16:3-4
You shall not eat {with it} anything leavened; seven days you shall eat {with it} unleavened bread of affliction, because in haste you went out from the land of Egypt, so that you will remember the day of your going out from the land of Egypt all the days of your life.