Revelation 16:9

“And men were scorched with great heat, etc.] Burned with rage against the followers of Christ; were filled with envy at the success of his Gospel, and with fury and madness at the ruinous condition of the antichristian state, being deprived of its head, and chief officers: and blasphemed the name of God, which hath power over these plagues; plagues or judgments are from God, when and wherever they come; they are sent and inflicted by him, and he can lessen or increase them, continue or remove them, as he pleases; and these, unless sanctified, will not reform men, but harden them, and set them a blaspheming the author of them. And this blasphemy may either respect the nature and perfections…”

“men--Greek, "the men." repented not to give him glory-- (Rev 9:20). Affliction, if it does not melt, hardens the sinner. Compare the better result on others, Rev 11:13; Rev 14:7; Rev 15:4.”

“And men were scorched with great heat - That is, as above expressed, calamity came upon them which would be well represented by such heat. It is said that this calamity would come upon people, and we are to suppose that it would be such that human life would be particularly affected; and as that heat of the sun must be exceedingly intense which would cut down people, we are to suppose that the judgment here referred to would be intensely severe. And blasphemed the name of God - The effect would be to cause them to blaspheme God or to reproach him as the author of these calamities; and in the fulfillment of this we are to look for a state of things when there would be augmented wickedness and…”

“And the men blasphemed God, who had power over these plagues - They could not but acknowledge the hand of God, yet did they harden themselves against him. Revelation 16:10”

“scorched: or, burned blasphemed: Rev 16:10, Rev 16:11, Rev 16:21; Kg2 6:33; Ch2 28:22; Isa 1:5, Isa 8:21; Jer 5:3, Jer 6:29, Jer 6:30; Eze 24:13 and they: Rev 16:11, Rev 2:21, Rev 9:20; Dan 5:22, Dan 5:23; Luk 13:3, Luk 13:5; Co2 12:21 to give: Rev 11:13, Rev 14:7; Jos 7:19; Jer 13:6; Amo 4:6-12 Revelation 16:10”