Exodus 12:34-39

34So the people took their dough before the yeast was added, with their kneading troughs bound up in their clothing on their shoulders.

35Now the Israelites had done as Moses told them – they had requested from the Egyptians silver and gold items and clothing.

36The Lord gave the people favor in the sight of the Egyptians, and they gave them whatever they wanted, and so they plundered Egypt.

37The Israelites journeyed from Rameses to Sukkoth. There were about 600,000 men on foot, plus their dependants.

38A mixed multitude also went up with them, and flocks and herds – a very large number of cattle.

39They baked cakes of bread without yeast using the dough they had brought from Egypt, for it was made without yeast – because they were thrust out of Egypt and were not able to delay, they could not prepare food for themselves either.