'Unleavened' in the Bible

You shall not eat {with it} anything leavened; seven days you shall eat {with it} unleavened bread of affliction, because in haste you went out from the land of Egypt, so that you will remember the day of your going out from the land of Egypt all the days of your life.

Six days you shall eat unleavened bread, and on the seventh day [there shall be] an assembly for Yahweh your God; you shall not do work.

Three times in the year all [of] your males shall appear {before } Yahweh your God at the place that he will choose, at the Feast of Unleavened Bread and at the Feast of Weeks and at the Feast of Booths, and they shall not appear {before Yahweh} empty-handed.