Exodus 12:39-41

Amplified Bible

³⁹ And they baked unleavened cakes of the dough which they brought from Egypt; it was not leavened, since they were driven [quickly] from Egypt and could not delay, nor had they prepared any food for themselves.

⁴⁰ Now the period of time the children of Israel lived in Egypt was four hundred and thirty years.^{(A) 41} At the end of the four hundred and thirty years, to that very day, all the hosts of the Lord [gathered into tribal armies] left the land of Egypt.