Revelation 18:3, 9

She has been ruined, because all the peoples of the earth have drunk the wine of the desire of her sexual sin. She has been ruined also because the kings of the earth have sinned sexually with her, and the merchants of the earth have grown rich from the great wealth of her luxury.”

The kings of the earth who sinned sexually with her and shared her wealth will see the smoke from her burning. Then they will cry and be sad because of her death.