'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.

No present which ye bring near to Jehovah is made fermented, for with any leaven or any honey ye perfume no fire-offering to Jehovah.

and there is not seen with thee leaven in all thy border seven days, and there doth not remain of the flesh which thou dost sacrifice at evening on the first day till morning.

And perfume with leaven a thank-offering, And proclaim willing gifts, sound ye! For so ye have loved, O sons of Israel, An affirmation of the Lord Jehovah.