Behold, I am against thee, O destroying {o} mountain, saith the LORD, which destroyest all the earth: and I will stretch out my hand upon thee, and roll thee down from the {p} rocks, and will make thee a burnt mountain.

(o) Not that Babylon stood on a mountain but because it was strong and seemed invincible.

(p) From your strongholds and fortresses.

Wesley's Notes

51:25 Mountain - Babylon was very high for its power, and greatness, and had very high walls and towers, that it looked at a distance like an high rocky mountain. They had destroyed many people. Burnt - Thy cities and towers which appear like a mountain shall be burnt.

Scofield Reference Notes

Margin O destroying mountain

See note 2 on Babylon, Isa 13:1 Zech 4:7, See Scofield Note: "Isa 13:1".

Jamieson-Fausset-Brown Bible Commentary

25. destroying mountain-called so, not from its position, for it lay low (Jer 51:13; Ge 11:2, 9), but from its eminence above other nations, many of which it had "destroyed"; also, because of its lofty palaces, towers, hanging gardens resting on arches, and walls, fifty royal cubits broad and two hundred high.

roll thee down from the rocks-that is, from thy rock-like fortifications and walls.

burnt mountain-(Re 8:8). A volcano, which, after having spent itself in pouring its "destroying" lava on all the country around, falls into the vacuum and becomes extinct, the surrounding "rocks" alone marking where the crater had been. Such was the appearance of Babylon after its destruction, and as the pumice stones of the volcano are left in their place, being unfit for building, so Babylon should never rise from its ruins.

Matthew Henry's Concise Commentary

51:1-58 The particulars of this prophecy are dispersed and interwoven, and the same things left and returned to again. Babylon is abundant in treasures, yet neither her waters nor her wealth shall secure her. Destruction comes when they did not think of it. Wherever we are, in the greatest depths, at the greatest distances, we are to remember the Lord our God; and in the times of the greatest fears and hopes, it is most needful to remember the Lord. The feeling excited by Babylon's fall is the same with the New Testament Babylon, Re 18:9,19. The ruin of all who support idolatry, infidelity, and superstition, is needful for the revival of true godliness; and the threatening prophecies of Scripture yield comfort in this view. The great seat of antichristian tyranny, idolatry, and superstition, the persecutor of true Christians, is as certainly doomed to destruction as ancient Babylon. Then will vast multitudes mourn for sin, and seek the Lord. Then will the lost sheep of the house of Israel be brought back to the fold of the good Shepherd, and stray no more. And the exact fulfilment of these ancient prophecies encourages us to faith in all the promises and prophecies of the sacred Scriptures.