John the Apostle
Revelation 16:21ESV·traditional attribution

And great hailstones, about one hundred pounds each, fell from heaven on people; and they cursed God for the plague of the hail, because the plague was so severe.

Matthew Henry Presbyterian @wholebiblehenry

Here we have an account of the seventh and last angel pouring forth his vial, contributing his part towards the accomplishment of the downfall of Babylon, which was the finishing stroke. And here, as before, observe, I. Where this plague fell - on the air, upon the prince of the power of the air, that is, the devil.

Commenting on Revelation 16:17-21

Albert Barnes Presbyterian @notesbybarnes

Verse 21. And there fell upon men a great hail out of heaven. Perhaps this is an allusion to one of the plagues of Egypt, . Compare Barnes on "Re 11:19". For a graphic description of the effects of a hail storm, second edition. Compare Barnes on "Job 38:22". Every stone about the weight of a talent. The Attic talent was equal to about 55 lbs. or 56 lbs.

Jamieson-Fausset-Brown Reformed @jfbcommentary

fell--Greek, "descends." upon men--Greek, "the men." and men blasphemed God--not those struck who died, but the rest. Unlike the result in the case of Jerusalem (Rev 11:13), where "the remnant . . . affrighted . . . gave glory to the God of heaven." was--Greek, "is." Next: Revelation Chapter 17