Exodus 12:29-39

Now it happened at midnight that the LORD struck every firstborn in the land of Egypt, from the firstborn of Pharaoh who sat on his throne to the firstborn of the prisoner who was in the dungeon, and all the firstborn of the cattle. Pharaoh got up in the night, he and all his servants and all the Egyptians, and there was a great cry [of heartache and sorrow] in Egypt, for there was no house where there was not someone dead. Then he called for Moses and Aaron at night and said, “Get up, get out from among my people, both you and the Israelites; and go, serve the LORD, as you said. Take both your flocks and your herds, as you have said, and go, and [ask your God to] bless me also.” The Egyptians [anxiously] urged the people [to leave], to send them out of the land quickly, for they said, “We will all be dead.” So the people took their dough before it was leavened, their kneading bowls being bound up in their clothes on their shoulders. Now the Israelites had acted in accordance with the word of Moses; and they had asked the Egyptians for articles of silver and articles of gold, and clothing. The LORD gave the people favor in the sight of the Egyptians, so that they gave them what they asked. And so they plundered the Egyptians [of those things]. Now the Israelites journeyed from Rameses to Succoth, about six hundred thousand men on foot, besides [the women and] the children. 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. [Num 11:4; Deut 29:11] 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.