'Unleavened Bread' in the Bible

and a basket of unleavened bread, cakes of fine flour mixed with oil, and wafers of unleavened bread spread with oil, along with their grain offering and their drink offering.

He shall also offer the ram as a sacrifice of peace offerings to the Lord, together with the basket of unleavened bread; the priest shall offer also its grain offering and its drink offering.

On the fourteenth day of the second month [thirty days later] at twilight, they shall observe it; they shall eat it with unleavened bread and bitter herbs.

There shall be a feast on the fifteenth day of this month; unleavened bread shall be eaten for seven days.