Exodus 12:37–39

37 And the ypeople of Israel journeyed from zRameses to Succoth, aabout six hundred thousand men on foot, besides women and children. 38 A bmixed multitude also went up with them, and very much livestock, both flocks and herds. 39 And they baked unleavened cakes of the dough that they had brought out of Egypt, for it was not leavened, because uthey were thrust out of Egypt and ccould not wait, nor had they prepared any provisions for themselves.