For he who avenges blood is mindful of them; he does not forget the cry of the afflicted.
The title refers to the tune itself, not some historical victory, the disputes over which battle David celebrates here are pointless. Yes, he gives thanks for God's power, but read the whole psalm as prayer: he recalls former deliverances to lift his heart toward confidence that God will do the same against these new enemies rising before him.
AI summary
Commenting on Psalm 9:1-20
When an inquest is held concerning the blood of the oppressed, the martyred saints will have the first remembrance; he will avenge his own elect. Those saints who are living shall also be heard; they shall be exonerated from blame, and kept from destruction, even when the Lord's most terrible work is going on; the man with the inkhorn by his side shall mark them...
Those who truly praise God desire that others praise Him too and labor to bring them to it. Sing praises to the Lord who dwells in Zion, in the assemblies of His people, there He meets them with His promises and expects their praises in return. Tell the nations what He has done; let them know the justice of God against those who shed innocent blood.
AI summary
Commenting on Psalm 9:11-20