'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 at the set feasts, three times in the year, at the feast of unleavened bread, and at the feast of weeks, and at the feast of tabernacles.

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

And the children of Israel, that were present at Jerusalem, held the feast of unleavened bread seven days with great gladness; and the Levites and the priests praised Jehovah day by day, with the instruments of praise to Jehovah.

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