Exodus 11:2-5

Tell all the Israelite men and women to ask their Egyptian neighbors for articles of silver and gold.” (Now the LORD had caused the Egyptians to look favorably on the people of Israel. And Moses was considered a very great man in the land of Egypt, respected by Pharaoh’s officials and the Egyptian people alike.) Moses had announced to Pharaoh, “This is what the LORD says: At midnight tonight I will pass through the heart of Egypt. All the firstborn sons will die in every family in Egypt, from the oldest son of Pharaoh, who sits on his throne, to the oldest son of his lowliest servant girl who grinds the flour. Even the firstborn of all the livestock will die.