Thematic Bible: During the feast of passover

You shall eat unleavened bread seven days; even the first day you shall put away leaven out of your houses. For whoever eats leavened bread from the first day until the seventh day, that soul shall be cut off from Israel. And on the first day shall be a holy gathering, and in the seventh day there shall be a holy gathering for you. No manner of work shall be done in them, except that which every man must eat, that only may be done by you. And you shall keep the Feast of Unleavened Bread. For in this same day I have brought your armies out of the land of Egypt. Therefore you shall keep this day in your generations by a law forever. read more.
In the first month, on the fourteenth day of the month at evening, you shall eat unleavened bread, until the twenty-first day of the month at evening. Seven days there shall be no leaven found in your houses. For whoever eats that which is leavened, even that soul shall be cut off from the congregation of Israel, among the aliens and among the natives of the land. You shall eat nothing leavened. In all your dwelling-places you shall eat unleavened bread.