Adam Clarke's Bible Commentary Verse 9. Shall be a boil] yj 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] t[b[ba ababuoth, supposed to come from h[b 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, &c. The Septuagint translate it thus: kai estai elkh fluktidev anazeousai? 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, Deut. xxviii. 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.
Matthew Henry Commentary
Verses 8-12 - When the Egyptians were not wrought upon by the death of their cattle God sent a plague that seized their own bodies. If lesser judgments d not work, God will send greater. Sometimes God shows men their sin in their punishment. They had oppressed Israel in the furnaces, and no the ashes of the furnace are made a terror to them. The plague itsel was very grievous. The magicians themselves were struck with thes boils. Their power was restrained before; but they continued to withstand Moses, and to confirm Pharaoh in his unbelief, till they wer forced to give way. Pharaoh continued obstinate. He had hardened his own heart, and now God justly gave him up to his own heart's lusts permitting Satan to blind and harden him. If men shut their eye against the light, it is just with God to close their eyes. This is the sorest judgment a man can be under out of hell.
Original Hebrew והיה1961 לאבק80 על5921 כל3605 ארץ776 מצרים4714 והיה1961 על5921 האדם120 ועל5921 הבהמה929 לשׁחין7822 פרח6524 אבעבעת76 בכל3605 ארץ776 מצרים׃4714