Exodus 9:3-6

3the hand of the Lord will bring a terrible plague on your livestock in the field—on your horses, donkeys and camels and on your cattle, sheep and goats. 4But the Lord will make a distinction between the livestock of Israel and that of Egypt, so that no animal belonging to the Israelites will die.’ ” 5The Lord set a time and said, “Tomorrow the Lord will do this in the land.” 6And the next day the Lord did it: All the livestock of the Egyptians died, but not one animal belonging to the Israelites died.