Exodus 12:37-40

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 — very much cattle.

39And they baked the dough that they brought forth out of Egypt into unleavened cakes, for it was not leavened; for they were driven out of Egypt, and could not wait; neither had they prepared for themselves any food.

40And the residence of the children of Israel that they resided in Egypt was four hundred and thirty years.