Exodus 12:19-20; Exodus 12:34; Exodus 12:39

19 Seven days shall there be no leaven found in your houses: for whosoever eateth that which is leavened, even that soul shall be cut off from the congregation of Israel, whether he be a stranger, or born in the land. 20 Ye shall eat nothing leavened; in all your habitations shall ye eat unleavened bread.
34 And the people took their dough before it was leavened, their kneadingtroughs being bound up in their clothes upon their shoulders.
39 And they baked unleavened cakes of the dough which they brought forth out of Egypt, for it was not leavened; because they were thrust out of Egypt, and could not tarry, neither had they prepared for themselves any victual.
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