'Leaven' in the Bible

No meal-offering, which ye shall offer unto Jehovah, shall be made with leaven; for ye shall burn no leaven, nor any honey, as an offering made by fire unto Jehovah.

And that which is left thereof shall Aaron and his sons eat: it shall be eaten without leaven in a holy place; in the court of the tent of meeting they shall eat it.

It shall not be baken with leaven. I have given it as their portion of my offerings made by fire; it is most holy, as the sin-offering, and as the trespass-offering.

And Moses spake unto Aaron, and unto Eleazar and unto Ithamar, his sons that were left, Take the meal-offering that remaineth of the offerings of Jehovah made by fire, and eat it without leaven beside the altar; for it is most holy;

Ye shall bring out of your habitations two wave-loaves of two tenth parts of an ephah : they shall be of fine flour, they shall be baken with leaven, for first-fruits unto Jehovah.