Exodus 12:37-42 - The Israelites Leave Egypt
37 And the sons of Israel will remove from Rameses to Succoth, about six hundred thousand footmen; men apart from the little ones. 38 And also a great mixture went up with them; and sheep and oxen, very much cattle. 39 And they will cook the dough which they brought out of Egypt unleavened cakes, for it was not leavened; for they were driven out of Egypt, for they could not linger, and also they made not for themselves food.
40 And the dwelling of the sons of Israel which they dwelt in Egypt, was thirty years and four hundred years. 41 And it will be from the end of thirty years and four hundred years, in this self-same day all the armies of Jehovah will go forth out of the land of Egypt 42 This a night of watchings to Jehovah, for bringing them forth out of the land of Egypt: it is this night to Jehovah of watching to all the sons of Israel for their generations.