Exodus 12:34-39

34So the people took 1their dough before it was leavened, with their kneading bowls bound up in the clothes on their shoulders.

352Now the sons of Israel had done according to the word of Moses, for they had requested from the Egyptians articles of silver and articles of gold, and clothing; 36and the Lord had given the people favor in the sight of the Egyptians, so that they let them have their request. Thus they 3plundered the Egyptians.

37Now the 4sons of Israel journeyed from 5Rameses to Succoth, about 6six hundred thousand men on foot, aside from children. 38A 7mixed multitude also went up with them, 8along with flocks and herds, a 9very large number of livestock. 39They baked the dough which they had brought out of Egypt into cakes of unleavened bread. For it had not become leavened, since they were 10driven out of Egypt and could not delay, nor had they 11prepared any provisions for themselves.