'Unleavened' in the Bible

‘Now when you bring an offering of a grain offering baked in an oven, it shall be unleavened cakes of fine flour mixed with oil, or unleavened wafers spread with oil.

If your offering is a grain offering made on the griddle, it shall be of fine flour, unleavened, mixed with oil;

What is left of it Aaron and his sons are to eat. It shall be eaten as unleavened cakes in a holy place; they are to eat it in the court of the tent of meeting.

If he offers it by way of thanksgiving, then along with the sacrifice of thanksgiving he shall offer unleavened cakes mixed with oil, and unleavened wafers spread with oil, and cakes of well stirred fine flour mixed with oil.

“Take Aaron and his sons with him, and the garments and the anointing oil and the bull of the sin offering, and the two rams and the basket of unleavened bread,

From the basket of unleavened bread that was before the Lord, he took one unleavened cake and one cake of bread mixed with oil and one wafer, and placed them on the portions of fat and on the right thigh.

Then Moses spoke to Aaron, and to his surviving sons, Eleazar and Ithamar, “Take the grain offering that is left over from the Lord’s offerings by fire and eat it unleavened beside the altar, for it is most holy.

Then on the fifteenth day of the same month there is the Feast of Unleavened Bread to the Lord; for seven days you shall eat unleavened bread.