Exodus 9:3-6
3 the hand of the Lord will bring a terrible plague on your livestock in the field—on your horses and donkeys and camels and on your cattle and sheep and goats.
4 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.’”
5 The Lord set a time and said, “Tomorrow the Lord will do this in the land.”
6 And the next day the Lord did it: All the livestock of the Egyptians died, but not one animal belonging to the Israelites died.