Charles Ellicott Commentary Psalms 45:5

"Thine arrows are sharp; The peoples fall under thee; [They are] in the heart of the king`s enemies." — Psalms 45:5 (ASV)

Your arrows. —Our version has transposed the clauses of this verse. The original is more vivid.

Your arrows are sharpened—
The people under You fall—
Against the heart of the king’s enemies.

The poet actually sees the battle raging before him.