David’s glorious reign
In chapters 18-20 David, already delivered from all internal conflict in Israel, triumphs over the heathen, and spreads the glory of Israel and of his reign on every side. These are the events which occasioned Psalm 18, although it has a more extended meaning (compare verses 36-45).
It will also be remarked that all David’s faults are passed over in silence. Faithfully recounted elsewhere, they have no place here, because it is the fulfillment of the ways and thoughts of God in the house of the elect king that is here depicted.
The children of the giant fall with the Philistines before the children of Israel.