Exodus 12:39 in the King James Version
And they baked unleavened cakes of the dough which they brought forth 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 victual.
Context
38 A mixed multitude went up also with them, with flocks, herds, and even very much livestock.
39 They baked unleavened cakes of the dough which they brought out of Egypt; for it wasn’t leavened, because they were thrust out of Egypt, and couldn’t wait, and they had not prepared any food for themselves.
40 Now the time that the children of Israel lived in Egypt was four hundred thirty years.