'Unleavened Bread' in the Bible

And a basket of unleavened bread, cakes of fine flour mixed with oil, and wafers of unleavened bread anointed with oil, and their grain offering, and their drink offerings.

And he shall offer the ram for a sacrifice of peace offerings unto the LORD, with the basket of unleavened bread: the priest shall offer also his grain offering, and his drink offering.

The fourteenth day of the second month at evening they shall keep it, and eat it with unleavened bread and bitter herbs.

And on the fifteenth day of this month is the feast: seven days shall unleavened bread be eaten.