Exodus 12:38-40

Amplified Bible

³⁸ A mixed multitude [of non-Israelites from foreign nations] also went with them, along with both flocks and herds, a very large number of livestock.^{(A) 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.^(B)