Exodus 12:29-32

And that night at midnight, the LORD struck down all the firstborn sons in the land of Egypt, from the firstborn son of Pharaoh, who sat on his throne, to the firstborn son of the prisoner in the dungeon. Even the firstborn of their livestock were killed. Pharaoh and all his officials and all the people of Egypt woke up during the night, and loud wailing was heard throughout the land of Egypt. There was not a single house where someone had not died. Pharaoh sent for Moses and Aaron during the night. “Get out!” he ordered. “Leave my people—and take the rest of the Israelites with you! Go and worship the LORD as you have requested. Take your flocks and herds, as you said, and be gone. Go, but bless me as you leave.”