Strong H2556A חָמֵץ châmêts · be sour

Exodus

1. Exodus 12:19
   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.
2. Exodus 12:20
   Ye shall eat nothing leavened; in all your habitations shall ye eat unleavened bread.
3. Exodus 12:34
   And the people took their dough before it was leavened, their kneadingtroughs being bound up in their clothes upon their shoulders.
4. Exodus 12:39
   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.