Exodus 12:39-41

Revised Standard Version

³⁹ And they baked unleavened cakes of the dough which they had brought 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 provisions.

⁴⁰ The time that the people of Israel dwelt in Egypt was four hundred and thirty years. ⁴¹ And at the end of four hundred and thirty years, on that very day, all the hosts of the Lord went out from the land of Egypt.