18. He looseth the bond of kings—He looseth the authority of kings—the "bond" with which they bind their subjects (Isa 45:1; Ge 14:4; Da 2:21).
a girdle—the cord, with which they are bound as captives, instead of the royal "girdle" they once wore (Isa 22:21), and the bond they once bound others with. So "gird"—put on one the bonds of a prisoner instead of the ordinary girdle (Joh 21:18).