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.
Exodus 12:24 And ye shall observe this thing for an ordinance to thee and to thy sons for ever.
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:)
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.
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.