Exodus 12:18

¹⁶And the first day shall be called holy, and the seventh day shall be a holy convocation to you: ye shall do no servile work on them, only as many things as will necessarily be done by every soul, this only shall be done by you.

¹⁷And ye shall keep this commandment, for on this day will I bring out your force out of the land of Egypt; and ye shall make this day a perpetual ordinance for you throughout your generations.

— Exodus 12:18 —

¹⁹Seven days leaven shall not be found in your houses; whosoever shall eat anything leavened, that soul shall be cut off from the congregation of Israel, both among the occupiers of the land and the original inhabitants.

²⁰Ye shall eat nothing leavened, but in every habitation of yours ye shall eat unleavened bread.