Psalm 18:39
For thou hast girded me with strength unto the battle: thou hast subdued under me those that rose up against me.
Cross-reference
Psalm 18:32 states God arms with strength, the same source of the battle strength mentioned in verse 39.
Psalm 44:5 uses nearly identical language: 'through you we push down our foes' — a direct parallel of God enabling victory.
2 Samuel 22:40 is the identical song, word-for-word parallel to this verse from David's psalm.
2 Samuel 22:41 is the parallel account of David's song, with identical wording about God making enemies turn back.
1 Corinthians 15:25-28 speaks of Christ putting all enemies under his feet, a typological fulfillment of David's victory.
Ephesians 1:22 describes all things under Christ's feet, echoing the subduing of enemies as a type of Christ's exaltation.
Isaiah 45:5 uses the same Hebrew root 'gird' — God equipping Cyrus, mirroring the equipping for battle here.
Zechariah 12:5 says inhabitants have strength through the Lord — a parallel theme of God-given strength in battle.