Exodus 12:6 'You shall keep it until the fourteenth day of the same month, then the whole assembly of the congregation of Israel is to kill it at twilight.

Exodus 12:17 You shall also observe the Feast of Unleavened Bread, for on this very day I brought your hosts out of the land of Egypt; therefore you shall observe this day throughout your generations as a permanent ordinance.

Exodus 12:24 "And you shall observe this event as an ordinance for you and your children forever.

Exodus 13:9 "And it shall serve as a sign to you on your hand, and as a reminder on your forehead, that the law of the LORD may be in your mouth; for with a powerful hand the LORD brought you out of Egypt.

Exodus 13:10 "Therefore, you shall keep this ordinance at its appointed time from year to year.

Leviticus 23:4 'These are the appointed times of the LORD, holy convocations which you shall proclaim at the times appointed for them.

Leviticus 23:5 'In the first month, on the fourteenth day of the month at twilight is the LORD'S Passover.

2 Kings 23:21 Then the king commanded all the people saying, "Celebrate the Passover to the LORD your God as it is written in this book of the covenant." (NASB ©1995)