Matthew Poole and continuators on Jeremiah 51:25

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

Babylon is not here called a Mountain because it was scituated upon any Hills or Mountains, for it appears from Genesis 11.2. that it was scituated in a plain, and we read verse 13. that it dwelt upon many Waters, but because it 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, and as some say (being a very large City) was full of Trees. They had destroyed many people of the Earth that lay near to them.

God threatens to destroy them notwithstanding their Towers, and great Fortifications, as many times they threw down Malefactors from high Rocks, Mountains, and Precipices.

And to make them like Aetna or Vesuvius, or like some other Mountains of Sulphur, or other bituminous matter fired, which are alwayes burning or else he▪ threateneth that their Cities and Towers which appeared like a Mountain should be burnt.