Exodus 13:10
and thou hast kept this statute at its appointed season from days to days.
Exodus 12:14
And this day hath become to you a memorial, and ye have kept it a feast to Jehovah to your generations; -- a statute age-during; ye keep it a feast.
Exodus 12:24-25
And ye have observed this thing, for a statute to thee, and to thy sons -- unto the age;
Exodus 23:15
the Feast of Unleavened things thou dost keep; seven days thou dost eat unleavened things, as I have commanded thee, at the time appointed in the month of Abib; for in it thou hast come forth out of Egypt, and ye do not appear in My presence empty;
Leviticus 23:6
and on the fifteenth day of this month is the feast of unleavened things to Jehovah; seven days unleavened things ye do eat;
Deuteronomy 16:3-4
'Thou dost not eat with it any fermented thing, seven days thou dost eat with it unleavened things, bread of affliction; for in haste thou hast come out of the land of Egypt; so that thou dost remember the day of thy coming out of the land of Egypt all days of thy life;