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. Let us therefore humble ourselves under the mighty hand of God, and go forth to meet him in the way of his judgments, that his anger may be turned away from us.

II.The signal by which this plague was summoned was the sprinkling of warm ashes from the furnace, towards heaven (Exo 9:8, Exo 9:10), which was to signify the heating of the air with such an infection as should produce in the bodies of the Egyptians sore boils, which would be both noisome and painful. Immediately upon the scattering of the ashes, a scalding dew came down out of the air, which blistered wherever it fell. Note, Sometimes God shows men their sin in their punishment; they had oppressed Israel in the furnaces, and now the ashes of the furnace are made as much a terror to them as ever their task-masters had been to the Israelites.

III.The plague itself was very grievous - a common eruption would be so, especially to the nice and delicate, but these eruptions were inflammations, like Job's. This is afterwards called the botch of Egypt (Deu 28:27), as if it were some new disease, never heard of before, and known ever after by that name, Note, Sores in the body are to be looked upon as the punishments of sin, and to be hearkened to as calls to repentance.

IV.The magicians themselves were struck with these boils, Exo 9:11. 1. Thus they were punished, (1.) For helping to harden Pharaoh's heart, as Elymas for seeking to ;pervert the right ways of the Lord; God will severely reckon with those that strengthen the hands of the wicked in their wickedness. (2.) For pretending to imitate the former plagues, and making themselves and Pharaoh sport with them. Those that would produce lice shall, against their wills, produce boils. Note, It is ill jesting with God's judgments, and more dangerous than playing with fire. Be you not mockers, lest your bands be made strong. 2. Thus they were shamed in the presence of their admirers. How weak were their enchantments, which could not so much as secure themselves! The devil can give no protection to those that are in confederacy with him. 3. Thus they were driven from the field. Their power was restrained before (Exo 8:18), but they continued to confront Moses, and confirm Pharaoh in his unbelief, till now, at length, they were forced to retreat, and could not stand before Moses, to which the apostle refers (Ti2 3:9) when he says that their folly was made manifest unto all men.

V.Pharaoh continued obstinate, for now the Lord hardened his heart, Exo 9:12. Before, he had hardened his own heart, and resisted the grace of God; and now God justly gave him up to his own heart's lusts, to a reprobate mind, and strong delusions, permitting Satan to blind and harden him, and ordering every thing, henceforward, so as to make him more and more obstinate. Note, Wilful hardness is commonly punished with judicial hardness. If men shut their eyes against the light, it is just with God to close their eyes. Let us dread this as the sorest judgment a man can be under on this side hell.

Shall be a boil - שחין shechin. This word is generally expounded, an inflammatory swelling, a burning boil; one of the most poignant afflictions, not immediately mortal, that can well affect the surface of the human body. If a single boil on any part of the body throws the whole system into a fever, what anguish must a multitude of them on the body at the same time occasion!

Breaking forth with blains - אבעבעת ababuoth, supposed to come from בעה baah, to swell, bulge out; any inflammatory swelling, node, or pustule, in any part of the body, but more especially in the more glandular parts, the neck, arm-pits, groin, etc. The Septuagint translate it thus: Και εσται ἑλκη φλυκτιδες αναζεουσαι· And it shalt be an ulcer with burning pustules. It seems to have been a disorder of an uncommon kind, and hence it is called by way of distinction, the botch of Egypt, Deu 28:27, perhaps never known before in that or any other country. Orosius says that in the sixth plague "all the people were blistered, that the blisters burst with tormenting pain, and that worms issued out of them." Alfred's Oros., lib. i., c. vii.

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 come down in the above manner, about Pharaoh's court, as a sign and token of what would be the case all over the kingdom:

and shall be a boil breaking forth with blains; that is, these ashes becoming a small dust, and falling down like the dew, snow, or sleet, yet hot and burning, should produce sore boils, burning ulcers, hot carbuncles, rising up in pustules, blisters, and buboes, which last word is pretty near in sound with the Hebrew word here used:

upon man, and upon beast, throughout all the land of Egypt; so that, as the last plague affected their property, substance, and riches, which in those times greatly lay in cattle, this, besides that, would affect their persons, and give them exceeding great pain, though it might not issue in death.

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. The attitude he assumed was similar to that of Eastern magicians, who, "when they pronounce an imprecation on an individual, a village, or a country, take the ashes of cows' dung (that is, from a common fire) and throw them in the air, saying to the objects of their displeasure, such a sickness or such a curse shall come upon you" [ROBERTS].