Charles Ellicott Commentary Psalms 18:37-40

"I will pursue mine enemies, and overtake them; Neither will I turn again till they are consumed. I will smite them through, so that they shall not be able to rise: They shall fall under my feet. For thou hast girded me with strength unto the battle: Thou hast subdued under me those that rose up against me. Thou hast also made mine enemies turn their backs unto me, That I might cut off them that hate me." — Psalms 18:37-40 (ASV)

Another retrospective glance of the poet over his past wars. Notice slight variations in Samuel.