Exodus 12:34-39

34And the people took their dough before it was leavened, their kneading-troughs being bound up in their clothes upon their shoulders. 35And the children of Israel did according to the word of Moses; and they asked of the Egyptians jewels of silver, and jewels of gold, and raiment: 36and Jehovah gave the people favor in the sight of the Egyptians, so that they let them have what they asked. And they despoiled the Egyptians.

37And the children of Israel journeyed from Rameses to Succoth, about six hundred thousand on foot that were men, besides children. 38And a mixed multitude went up also with them; and flocks, and herds, even very much cattle. 39And 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 victuals.