Exodus 9:3-7

9:3 then the hand of the Lord will surely bring a very terrible plague on your livestock in the field, on the horses, the donkeys, the camels, the herds, and the flocks. 9:4 But the Lord will distinguish between the livestock of Israel and the livestock of Egypt, and nothing will die of all that the Israelites have.”’”

9:5 The Lord set an appointed time, saying, “Tomorrow the Lord will do this in the land.” 9:6 And the Lord did this on the next day; all the livestock of the Egyptians died, but of the Israelites’ livestock not one died. 9:7 Pharaoh sent representatives to investigate, and indeed, not even one of the livestock of Israel had died. But Pharaoh’s heart remained hard, and he did not release the people.