'Unleavened Bread' in the Bible

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

and out of the basket of unleavened bread that was before Jehovah he took one unleavened cake, and a cake of oiled bread, and one wafer, and put them on the fat and upon the right shoulder;

And Moses spoke to Aaron, and to Eleazar and to Ithamar, his sons that were left, Take the oblation that is left of Jehovah's offerings by fire, and eat it with unleavened bread beside the altar; for it is most holy.

And on the fifteenth day of this month is the feast of unleavened bread to Jehovah; seven days shall ye eat unleavened bread.