2 Samuel 22:48

It is God that avengeth me, and that bringeth down the people under me,

The song that holds this line arose while Saul was pursuing David to kill him. It looks back over David's dangers and the deliverances granted him. Within that remembrance the line praises God as the One who takes vengeance for David and who brings down peoples under his rule. The song thus credits God with preserving David, honoring Him as his merciful preserver. That preservation from Saul was wrought by God's special providence.