John Gill Commentary Psalms 60:9

"Who will bring me into the strong city? Who hath led me unto Edom?" — Psalms 60:9 (ASV)

Who will bring me [into] the strong city ?
&c.] Which some understand of Rabbah of the Ammonites, which Joab besieged, and sent to David to come and take it in person, (2 Samuel 12:26 2 Samuel 12:29) . The Targum interprets it of Tyre, which was a strong fortified city, (Ezekiel 26:4Ezekiel 26:11) . It rather seems to be the same with Edom, or the metropolis of the Edomites; since it follows:

who will lead me into Edom ?
which was situated in the clefts of the rock, and on the height of the hill, (Jeremiah 49:16) ; but is mystically to be understood of the city of Rome, the great and mighty city, as it is often called in the book of the Revelation, (Revelation 11:8) (17:18) (18:10) ; whose destruction is certain, being predicted; and after which there have been desires raised in the hearts of God's people in all ages; and particularly just before the time God will put it into the hearts of the kings of the earth to burn it with fire; who are here represented by David, as desirous of entering into it in triumph to destroy it, (Revelation 17:16) .