Exodus 9:3-6

the 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. But 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.’ ” The LORD set a time and said, “Tomorrow the LORD will do this in the land.” And the next day the LORD did it: All the livestock of the Egyptians died, but not one animal belonging to the Israelites died.