Moses
Exodus 9:9BSB·traditional attribution

It will become fine dust over all the land of Egypt, and festering boils will break out on man and beast throughout the land.”

Matthew Henry Presbyterian @wholebiblehenry

Observe here, concerning the plague of boils and blains, I. When they were not wrought upon by the death of their cattle, God sent a plague that seized their own bodies, and touched them to the quick. If less judgments do not do their work, God will send greater.

Commenting on Exodus 9:8-12

John Gill Reformed Baptist @doctorgill

And it shall become small dust in all the land of Egypt,.... Which ashes, thrown up into the air, should be so multiplied and spread as to be over all the land of Egypt, and come down like showers of snow or sleet everywhere, only of a hot and scalding nature; or these handfuls of ashes were to be cast up into the air, and...

Jamieson-Fausset-Brown Reformed @jfbcommentary

PLAGUE OF BOILS. (Exo 9:8-17) Take to you handfuls of ashes, &c.--The next plague assailed the persons of the Egyptians, and it appeared in the form of ulcerous eruptions upon the skin and flesh (Lev 13:20; Kg2 20:7; Job 2:7). That this epidemic did not arise from natural causes was evident from its taking effect from the particular action of Moses done in the sight of Pharaoh.

Commenting on Exodus 9:8-17