Psalm 45:3 in the King James Version
Gird thy sword upon thy thigh, O most mighty, with thy glory and thy majesty.
Context
2 You are the most excellent of the sons of men. Grace has anointed your lips, therefore God has blessed you forever.
3 Strap your sword on your thigh, O mighty one, in your splendor and your majesty.
4 In your majesty ride on victoriously on behalf of truth, humility, and righteousness. Let your right hand display awesome deeds.