Judah also shall fight at Jerusalem. The adversus Jerusalem of the Vulgate and some Jewish interpreters is a mistake, and introduces a wholly irrelevant idea. The meaning is that the Judaeans outside of Jerusalem, the nation at large, rallying to the attack, shall fall on the enemy, now thinned by pestilence and internecine conflicts within the walls of the city, and prevail against them (comp.
Zechariah 12:6). Septuagint, ἰούδας παρατάξεται ἐν ἱερουσαλήμ," Judah shall draw up his forces in Jerusalem." The wealth of all the heathen (nations) round about. The costly booty of the enemy shall fall into Judah's hands.
Thus the Church emerges victorious from persecutions, and is enriched and adorned by the means of those who planned her overthrow.