Isaiah 11:5

“And righteousness shall be the girdle of his loins, &c.] He shall be adorned with it, strengthened by it, and ready at all times to perform it; he loved righteousness, and did acts of righteousness throughout the whole course of his life; and, by his active and passive obedience, wrought out an everlasting righteousness for his people; he is a King that reigns in righteousness, righteousness is the sceptre of his kingdom; all his administrations of government are righteous; just and true are all his ways: and faithfulness the girdle of his reins; he was faithful to God, that appointed him as King and Head of the church; faithful as a Prophet, in declaring his mind and will; and is a faithful…”

“righteousness . . . girdle-- (Rev 1:13; Rev 19:11). The antitypical High Priest (Exo 28:4). The girdle secures firmly the rest of the garments (Pe1 1:13). So "truth" gives firm consistency to the whole character (Eph 5:14). In Isa 59:17, "righteousness" is His breastplate.”

“And righteousness shall be the gridle of his loins - The sense of this verse is plain. He will always exhibit himself as a just and faithful king. “The girdle of the loins” refers to the cincture, or band, with which the ancients girded themselves. A part of their dress consisted of an outward, loose, flowing robe. This robe it was necessary to gird up, or to confine close to the body in active labor, or in running; and the meaning of the figure used here is, probably, that the virtues of righteousness and justice would adhere to him as closely and inseparably as the garment does to the body to which it was bound. The figure of representing the virtues as clothing, or describing them as…”

“The girdle - It shall adorn him, and be the glory of his government, as a girdle was used for an ornament, Isa 3:24, and as an ensign of power, Job 12:18, and it shall constantly cleave to him in all his administrations, as a girdle cleaveth to a man's loins. Isaiah 11:6”

“11:5 By virtue of the righteous character of the Messiah, his reign will be characterized by justice, righteousness, and truth, in contrast to the conditions of Jerusalem described in 1:21.”

“righteousness: Isa 59:17; Psa 93:1; Co2 6:7; Eph 6:14; Pe1 4:1; Rev 1:13 and faithfulness: Isa 25:1; Hos 2:20; Heb 2:17; Jo1 1:9; Rev 3:14 Isaiah 11:6”