John Gill Commentary Nahum 2:10

"She is empty, and void, and waste; and the heart melteth, and the knees smite together, and anguish is in all loins, and the faces of them all are waxed pale." — Nahum 2:10 (ASV)

She is empty, and void, and waste
The city of Nineveh, empty of inhabitants, being killed, or having fled; and stripped of all its treasures and riches by the enemies; its walls and houses demolished and pulled down, and laid in ruins, and become a heap of rubbish; (See Gill on Nahum 1:8). Various words are here used to ascertain and confirm the thing; and there is an elegant play on words or likeness of sounds, which our language will not express:

and the heart melts ;
the heart of every inhabitant of Nineveh melted with fear at the approach of their enemies, their entrance into the city, and plunder of it; flowed like water, or melted like wax; see (Psalms 22:14) :

and the knees smite together ;
like people in a fright, and when a panic has seized them; and as it was with Belshazzar, (Daniel 5:6) :

and much pain [is] in all loins ;
like that of women in travail; or of persons in a sudden fright, which gives them a pain in their backs at once:

and the faces of them all gather blackness ;
like a pot, as the Targum adds; being in great distress and disconsolation, which make men appear in a dismal hue, and their countenances look very dark and gloomy; see (Joel 2:6) .