Exodus 12:15-18 - The Festival Of Unleavened Bread
15 Seven days ye eat unleavened things; only -- in the first day ye cause leaven to cease out of your houses; for any one eating anything fermented from the first day till the seventh day, even that person hath been cut off from Israel. 16 And in the first day is a holy convocation, and in the seventh day ye have a holy convocation; any work is not done in them, only that which is eaten by any person -- it alone is done by you,
17 and ye have observed the unleavened things, for in this self-same day I have brought out your hosts from the land of Egypt, and ye have observed this day to your generations -- a statute age-during. 18 In the first month, in the fourteenth day of the month, in the evening, ye do eat unleavened things until the one and twentieth day of the month, at evening;