Isaiah 51:5

“My righteousness is near, &c.] These are either the words of God the Father, and to be understood not of his essential righteousness, nor of his vindictive justice; but of the righteousness of his Son, which he calls his own, because he approves and accepts of it, imputes and reckons it to his people, and with it justifies them. The words may be rendered, “my righteous One”, as in the Vulgate Latin version; not Cyrus, as Grotius; but Christ, God’s righteous servant, who was near to come in the flesh, in order to work righteousness. Or these are the words of Christ, speaking of his own righteousness, which was near being wrought out by him, as it was when he became the end of the law for it,…”

“righteousness . . . near--that is, faithful fulfilment of the promised deliverance, answering to "salvation" in the parallel clause (Isa 46:13; Isa 56:1; Rom 10:8-9). Ye follow after "righteousness"; seek it therefore, from Me, and you will not have far to go for it (Isa 51:1). arms--put for Himself; I by My might. judge-- (Isa 2:3-4; Psa 98:9). isles, &c.-- (Isa 60:9). arm-- (Rom 1:16), "the power of God unto (the Gentiles as well as the Jews) salvation."”

“My righteousness is near - The word ‘righteousness’ is used in a great variety of significations. Here it means, probably, the faithful completion of his promises to his people (Lowth). My salvation is gone forth - The promise of salvation is gone forth, and already the execution of that purpose is commenced. He would soon deliver his people; he would at no distant period extend salvation to all nations. And mine arm shall judge the people - That is, shall dispense judgment to them. The ‘arm’ here is put for himself, as the arm is the instrument by which we execute our purposes (see the notes at Isaiah 51:9). The isles shall wait upon me - The distant nations; the pagan lands (see the note…”

“My righteousness - My salvation, the redemption of all my people, Jews and Gentiles, which is the effect of his righteousness, his justice, faithfulness, or mercy. Is gone - Shall shortly go forth. Judge - Shall subdue the Gentiles to my authority, and rule them by my word and spirit. Isles - The remote countries shall expect this salvation from me, and from me only. Isaiah 51:6”

“51:5 God is strong enough to crush his enemies and rescue his people, such as when he rescued Israel in the Exodus (see 51:9; Exod 6:6; 15:16).”

“righteousness: Isa 46:13, Isa 56:1; Deu 30:14; Psa 85:9; Mat 3:2; Rom 1:16, Rom 1:17, Rom 10:6-10 my salvation: Isa 2:2, Isa 2:3; Eze 47:1-5; Mat 28:18; Mar 16:15; Luk 24:47; Rom 10:17, Rom 10:18 mine: Sa1 2:10; Psa 50:4-6, Psa 67:4, Psa 96:13, Psa 98:9, Psa 110:6; Joe 3:12; Joh 5:22, Joh 5:23; Act 17:31; Rom 2:16; Co2 5:10 the isles: Isa 42:4, Isa 49:1, Isa 60:9; Zep 2:11; Rom 1:16, Rom 15:9-12 Isaiah 51:6”