Exodus 9:1-9

Then the LORD said to Moses, “Go in to Pharaoh and tell him, ‘Thus says the LORD God of the Hebrews: “Let My people go, that they may serve Me. For if you refuse to let them go, and still hold them, behold, the hand of the LORD will be on your cattle in the field, on the horses, on the donkeys, on the camels, on the oxen, and on the sheep—a very severe pestilence. And the LORD will make a difference between the livestock of Israel and the livestock of Egypt. So nothing shall die of all that belongs to the children of Israel.” ’ ” Then the LORD appointed a set time, saying, “Tomorrow the LORD will do this thing in the land.” So the LORD did this thing on the next day, and all the livestock of Egypt died; but of the livestock of the children of Israel, not one died. Then Pharaoh sent, and indeed, not even one of the livestock of the Israelites was dead. But the heart of Pharaoh became hard, and he did not let the people go. So the LORD said to Moses and Aaron, “Take for yourselves handfuls of ashes from a furnace, and let Moses scatter it toward the heavens in the sight of Pharaoh. And it will become fine dust in all the land of Egypt, and it will cause boils that break out in sores on man and beast throughout all the land of Egypt.”