What does Psalm 108:13 mean?

Psalm 108 is composed of segments of two other Davidic psalms (Psalm 57:7–11; 60:5–12). Both segments come from the end of their respective passages. Both are responses to some difficulty or danger. Here, Davd expresses total confidence in God—rather than in human efforts. Psalm 60 was written when David found himself facing enemies on two fronts (2 Samuel 8:3; 1 Chronicles 18:3; Psalm 60:1–4). Despite challenges, God's people can be confident in His loyal, consistent love. In the case of the nation of Israel, the Lord had promised they would not be defeated by Edom (Numbers 24:18). David's experience supported that prophecy (2 Samuel 8:14; 1 Chronicles 18:12–13).

The anticipated victory here is one of absolute dominance combined with divine judgment. When God chooses to act, His power is unavoidable and unstoppable. A large component of the end times will be Jesus' return to establish His physical kingdom on earth (Hebrews 2:7–8; Revelation 19:15). With God on one's side, there is no reason to fear any human army (Revelation 19:16).