Exodus 12:16-17

And in the first day {there shall be} an holy convocation, and in the seventh day there shall be an holy convocation to you; no manner of work shall be done in them, save {that} which every man must eat, that only may be done of you. {man: Heb. soul} And ye shall observe {the feast of} unleavened bread; for in this selfsame day have I brought your armies out of the land of Egypt: therefore shall ye observe this day in your generations by an ordinance for ever.