'Leaven' in the Bible

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.

seven days leaven is not found in your houses, for any one eating anything fermented -- that person hath been cut off from the company of Israel, among the sojourners or among the natives of the land;

unleavened things are eaten the seven days, and any thing fermented is not seen with thee; yea, leaven is not seen with thee in all thy border.