Who will bring me into the strong city? who will lead me into Edom?
-Anticipation of, and prayer for, success in the expedition against Edom.
Verse 9. Who will bring me into the strong city? - `the city of strength' (Psalms 31:21): Petra, or Sela, the rock-built city of Idumea (2 Kings 14:7).
Verse 10. Writ not thou, O God - because of thy promise (Psalms 60:6).
Which hadst cast us off, and thou, O God, which didst not go out with our armies? - quoted from Psalms 44:9. Faith believes the final fulfillment of the promise, in spite of contrary appearances for a time.
Verse 11. Vain is the help of man. "Vain" - i:e., 'deceptive,' disappointing.
Verse 12. Through God we shall do valiantly - according to Balaam's prophecy (Numbers 24:18).
He ... shall tread down our enemies - fulfilled against Edom (2 Samuel 8:14; Psalms 44:5).