'Unleavened Bread' in the Bible

"Take Aaron and his sons with him, and the garments, the anointing oil, the sin offering bull, 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 loaf, one loaf of bread mixed with olive oil, and one wafer, and placed them on the fat parts and on the right thigh.

Then on the fifteenth day of the same month will be the festival of unleavened bread to the Lord; seven days you must eat unleavened bread.