'Unleavened Bread' in the Bible

You shall eat no leavened bread with it. Seven days you shall eat unleavened bread with it, the bread of affliction, for you came forth out of the land of Egypt in haste, so that you may remember the day that you came forth out of the land of Egypt all the days of your life.

Six days you shall eat unleavened bread. And on the seventh day shall be a solemn assembly to Jehovah your God. You shall do no work.

Three times in a year shall all your males appear before Jehovah your God in the place which He shall choose: in the Feast of Unleavened Bread, and in the Feast of Weeks, and in the Feast of Tabernacles. And they shall not appear before Jehovah empty,