John Trapp on Isaiah 11:5

Ver. 5. And righteouſneſs ſhall be the girdle of his Loyns] Symbelum Regis hoc eſt, The girdle is put for a Kingly Enſign, Job 12.18. Calvin. ſaith Scultetus. Kings and Princes have their ſcita in ſcutis, their Motto's on their Eſcucheons; ſo hath our King here, viz. Righteouſneſs and Faithfulneſs: and this is ſo manifeſt as if written on his girdle, or belt: See Rev. 19.16. where for like cauſe, Chriſts high Titles are written on his veſture, and on his thigh. Others, by this Expreſſion underſtand Chriſts alacrity and promptitude to vindicate his Elect, and to puniſh the wicked, according to his promiſe, Vaticinatur de Chriſti ſolertia in obeundis regni Dei negotiis, ac tribuit illi cincturam, ſeu induſtriam ſpiritualem pro qualitate obeundae diſpenſationis. Zeged. Let us alſo, Chriſt-like, gird up the loyns of our minds, he ſober, and hope perfectly, 1 Pet. 1.13. Gird our ſelves and ſerve him, Luke 17.8. readily, nimbly, handſomely and hardily: A looſe diſcinct and diffluent mind is unfit for Gods ſervice.