Jerome : "And it shall come to pass, when the Lord has completed all his works on Mount Zion and in Jerusalem, that I will visit the fruit of the noble heart of the king of Assyria, and upon the glory of the height of his eyes." After the captivity of Samaria and the victory of the Assyrians, and the threat against Jerusalem, because they imitated the idols of Samaria, they should be punished with a similar sentence; now against Assyria itself, which has become proud and thought its own strength was what led to victory, the Prophet speaks. There are those who generally believe that these things are said against the kingdom of the Assyrians because after the Lord completes all his works on Mount Zion and in Jerusalem, that is, after Jerusalem has been overthrown, the empire of the Assyrians will be destroyed. However, from what follows, the threat seems to be specifically against King Sennacherib of Assyria. When it says, "After the Lord completes all his works on Mount Zion and in Jerusalem," it does not signify the destruction of the city, but rather the siege, when the commander Rabsaces came with Sennacherib, and did those things which the same Prophet recounts later on (Isai. XXXVII, 17). — Commentary on Isaiah