Exodus 9:1-3

“Go back to Pharaoh,” the LORD commanded Moses. “Tell him, ‘This is what the LORD, the God of the Hebrews, says: Let my people go, so they can worship me. If you continue to hold them and refuse to let them go, the hand of the LORD will strike all your livestock—your horses, donkeys, camels, cattle, sheep, and goats—with a deadly plague.