Exodus 12:14 - And this day shall be unto you for a memorial; and ye shall keep it a feast to the LORD throughout your generations; ye shall keep it a feast by an ordinance for ever. (Verses like Exodus 12:14)
Exodus 12:24-25 - And ye shall observe this thing for an ordinance to thee and to thy sons for ever.And it shall come to pass, when ye be come to the land which the LORD will give you, according as he hath promised, that ye shall keep this service. (Verses like Exodus 12:24)
Exodus 23:15 - Thou shalt keep the feast of unleavened bread: (thou shalt eat unleavened bread seven days, as I commanded thee, in the time appointed of the month Abib; for in it thou camest out from Egypt: and none shall appear before me empty:) (Verses like Exodus 23:15)
Leviticus 23:6 - And on the fifteenth day of the same month is the feast of unleavened bread unto the LORD: seven days ye must eat unleavened bread. (Verses like Leviticus 23:6)
Deuteronomy 16:3-4 - Thou shalt eat no leavened bread with it; seven days shalt thou eat unleavened bread therewith, even the bread of affliction; for thou camest forth out of the land of Egypt in haste: that thou mayest remember the day when thou camest forth out of the land of Egypt all the days of thy life.And there shall be no leavened bread seen with thee in all thy coast seven days; neither shall there any thing of the flesh, which thou sacrificedst the first day at even, remain all night until the morning. (Verses like Deuteronomy 16:3)