Exodus 9:6-8

King James Version

⁶ And the Lord did that thing on the morrow, and all the cattle of Egypt died: but of the cattle of the children of Israel died not one.

⁷ And Pharaoh sent, and, behold, there was not one of the cattle of the Israelites dead. And the heart of Pharaoh was hardened, and he did not let the people go.

⁸ And the Lord said unto Moses and unto Aaron, Take to you handfuls of ashes of the furnace, and let Moses sprinkle it toward the heaven in the sight of Pharaoh.