חֲגֽוֹר־חַרְבְּךָ֣ עַל־יָרֵ֣ךְ גִּבּ֑וֹר ה֝וֹדְךָ֗ וַהֲדָרֶֽךָ׃
Gird thy sword upon thy thigh, O mighty one, Thy glory and thy majesty.
Rashi on Psalms
Gird a sword on your thigh to wage the war of Torah, and that is your majesty and that is your glory.