Exodus 9:10

Moses sprinkled it up toward heaven. — Presenting it, as it were, to God, in evidence of His people’s wrongs.

A boil breaking forth with blains. — Heb., an inflammation, producing pustules. Diseases of this character are not uncommon in Egypt (comp. Deuteronomy 28:27), but they are not often very severe; nor do they attack indifferently man and beast. The miraculous character of the plague was shown (1) by its being announced beforehand; (2) by its severity (Exodus 9:11); (3) by its universality (Exodus 9:11); and (4) by its extension to animals.