The Seventh Plague of Egypt

The standard catalogue lists this as the Seventh Plague, but the image seems to conflate two of the Plagues of Egypt that are described in Exodus 9. 9:3: Behold, the hand of the Lord is upon thy cattle which is in the field, upon the horses, upon the asses, upon the camels, upon the oxen, and upon the sheep... 9:6: And the Lord did that thing on the morrow... 9:22: And the Lord said unto Moses, Stretch forth thine hand toward heaven, that there may be hail in all the land of Egypt, upon man, and upon beast... 9:23: And Moses stretched forth his rod toward heaven: and the Lord sent thunder and hail, and the fire ran along the ground... 9:25 And the hail smote throughout all the land of Egypt all that was in the field, both man and beast..