'Unleavened Bread' in the Bible

even as the duty of every day required, offering according to the commandment of Moses, on the sabbaths, and on the new moons, and on the set feasts, three times in the year, even in the feast of unleavened bread, and in the feast of weeks, and in the feast of tabernacles.

And there assembled at Jerusalem much people to keep the feast of unleavened bread in the second month, a very great assembly.

And the children of Israel that were present at Jerusalem kept the feast of unleavened bread seven days with great gladness; and the Levites and the priests praised Jehovah day by day,'singing with loud instruments unto Jehovah.

And the children of Israel that were present kept the passover at that time, and the feast of unleavened bread seven days.