Exodus 12:29-39 NKJV
And it came to pass at midnight that the LORD struck all the firstborn in the land of Egypt, from the firstborn of Pharaoh who sat on his throne to the firstborn of the captive who was in the dungeon, and all the firstborn of livestock. So Pharaoh rose in the night, he, all his servants, and all the Egyptians; and there was a great cry in Egypt, for there was not a house where there was not one dead.
Then he called for Moses and Aaron by night, and said, “Rise, go out from among my people, both you and the children of Israel. And go, serve the LORD as you have said. Also take your flocks and your herds, as you have said, and be gone; and bless me also.”
And the Egyptians urged the people, that they might send them out of the land in haste. For they said, “We shall all be dead.” So the people took their dough before it was leavened, having their kneading bowls bound up in their clothes on their shoulders. Now the children of Israel had done according to the word of Moses, and they had asked from the Egyptians articles of silver, articles of gold, and clothing. And the LORD had given the people favor in the sight of the Egyptians, so that they granted them what they requested. Thus they plundered the Egyptians.
Then the children of Israel journeyed from Rameses to Succoth, about six hundred thousand men on foot, besides children. A mixed multitude went up with them also, and flocks and herds—a great deal of livestock. And they baked unleavened cakes of the dough which they had brought out of Egypt; for it was not leavened, because they were driven out of Egypt and could not wait, nor had they prepared provisions for themselves.
NKJV: New King James Version