'Unleavened Bread' in the Bible

“Take Aaron and his sons with him, and the garments [which are symbols of their office], and the anointing oil, and the bull for the sin offering, and the two rams, and the basket of unleavened bread;

and from the basket of unleavened bread that was before the Lord, he took one unleavened cake, a cake of oiled bread, and one wafer and put them on the fat and on the right thigh;

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