Exodus 12
14 Ref `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.
15 Ref 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.