Exodus 12:37-39

American Standard Version

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