John the Apostle
Revelation 18:15ESV·traditional attribution

The merchants of these wares, who gained wealth from her, will stand far off, in fear of her torment, weeping and mourning aloud,

Matthew Henry Presbyterian @wholebiblehenry

Here we have, I. A doleful lamentation made by Babylon's friends for her fall; and here observe, 1. Who are the mourners, namely, those who had been bewitched by her fornication, those who had been sharers in her sensual pleasures, and those who had been gainers by her wealth and trade - the kings and the merchants of the earth: the kings of the earth...

Commenting on Revelation 18:9-24

John Gill Reformed Baptist @doctorgill

And saying, alas, alas! that great city,..... Using the same words the kings of the earth do, Rev 18:10 only adding, suitable to their characters as merchants, and the things they traded in with her, that was clothed in fine linen, and purple, and scarlet, and decked with gold, and precious stones, and pearls; See Gill on Rev 18:12, Rev 17:4, see also Eze 27:32.

Albert Barnes Presbyterian @notesbybarnes

Verse 15. The merchants of these things. Who trafficked in these things, and who supplied the city with them, . Which were made rich by her. By traffic with her. Shall stand afar off. . For fear of her torment. Struck with terror by her torment, so that they did not dare to approach her, .