Nahum 2:6

_ _ The gates of the rivers ... opened — The river wall on the Tigris (the west defense of Nineveh) was 4,530 yards long. On the north, south, and east sides, there were large moats, capable of being easily filled with water from the Khosru. Traces of dams (“gates,” or sluices) for regulating the supply are still visible, so that the whole city could be surrounded with a water barrier (Nahum 2:8). Besides, on the east, the weakest side, it was further protected by a lofty double rampart with a moat two hundred feet wide between its two parts, cut in the rocky ground. The moats or canals, flooded by the Ninevites before the siege to repel the foe, were made a dry bed to march into the city, by the foe turning the waters into a different channel: as Cyrus did in the siege of Babylon [Maurer]. In the earlier capture of Nineveh by Arbaces the Mede, and Belesis the Babylonian, Diodorus Siculus, [1.2.80], states that there was an old prophecy that it should not be taken till the river became its enemy; so in the third year of the siege, the river by a flood broke down the walls twenty furlongs, and the king thereupon burnt himself and his palace and all his concubines and wealth together, and the enemy entered by the breach in the wall. Fire and water were doubtless the means of the second destruction here foretold, as of the first.

_ _ dissolved — by the inundation [Henderson]. Or, those in the palace shall melt with fear, namely, the king and his nobles [Grotius].