Explanatory Notes on the Whole Bible, by John Wesley, [1754-65], at sacred-texts.com
psa 21:3Prevent - Crowning him with manifold blessings, both more and sooner than he expected. With - With excellent blessings.
psa 21:4For ever - Thou gavest him a long life and reign here, and after that didst translate him to live with thee for ever. But this was more eminently fulfilled in Christ, who asked of his father, life, or to be saved from death, Heb 5:7, though with submission to his will: but his father, though he saw it necessary to take away his temporal life, yet instantly gave him another, far more noble, even the perfect possession of an everlasting life both in his soul and body, at his right hand.
psa 21:5Glory - His fame or renown. Salvation - By reason of those great and glorious deliverances which thou hast wrought both for him, and by him.
psa 21:6Countenance - Smiling upon him, by thy grace and favour.
psa 21:9Oven - Like wood, which when it is cast in there, is quickly consumed.
psa 21:10Fruit - Their children. God will take away both root and branch, the parents and all that wicked race.
psa 21:11Thee - Against God, not directly, but by consequence, because it was against David, whom God had anointed, and against the Lord's people, whose injuries God takes as done to himself.
psa 21:13Exalted - By thy own power, or by the manifestation thereof.