A Commentary, Critical, Practical, and Explanatory on the Old and New Testaments, by Robert Jamieson, A.R. Fausset and David Brown  at sacred-texts.com
isa 62:1INTERCESSORY PRAYERS FOR ZION'S RESTORATION, ACCOMPANYING GOD'S PROMISES OF IT, AS THE APPOINTED MEANS OF ACCOMPLISHING IT. (Isa 62:1-12)
I--the prophet, as representative of all the praying people of God who love and intercede for Zion (compare Isa 62:6-7; Psa 102:13-17), or else Messiah (compare Isa 62:6). So Messiah is represented as unfainting in His efforts for His people (Isa 42:4; Isa 50:7).
righteousness thereof--not its own inherently, but imputed to it, for its restoration to God's favor: hence "salvation" answers to it in the parallelism. "Judah" is to be "saved" through "the Lord our (Judah's and the Church's) righteousness" (Jer 23:6).
as brightness--properly the bright shining of the rising sun (Isa 60:19; Isa 4:5; Sa2 23:4; Pro 4:18).
isa 62:2(Isa 11:10; Isa 42:1-6; Isa 49:7, Isa 49:22-23; Isa 60:3, Isa 60:5, Isa 60:16).
new name--expression of thy new and improved condition (Isa 62:4), the more valuable and lasting as being conferred by Jehovah Himself (Isa 62:12; Isa 65:15; Rev 2:17; Rev 3:12).
isa 62:3(Zac 9:16)
in . . . hand of . . . Lord--As a crown is worn on the head, not "in the hand," hand must here be figurative for "under the Lord's protection" (compare Deu 33:3). "All His saints are in thy hand." His people are in His hand at the same time that they are "a crown of glory" to Him (Rev 6:2; Rev 19:12); reciprocally, He is "a crown of glory and a diadem of beauty" to them (Isa 28:5; compare Mal 3:17).
isa 62:4be termed--be "forsaken," so as that that term could be applicable to thee.
Hephzi-bah-- (Kg2 21:1), the name of Hezekiah's wife, a type of Jerusalem, as Hezekiah was of Messiah (Isa 32:1): "my delight is in her."
Beulah--"Thou art married." See the same contrast of Zion's past and future state under the same figure (Isa 54:4-6; Rev 21:2, Rev 21:4).
land . . . married--to Jehovah as its Lord and Husband: implying not only ownership, but protection on the part of the Owner [HORSLEY].
isa 62:5thy sons--rather, changing the points, which are of no authority in Hebrew, "thy builder" or "restorer," that is, God; for in the parallel clause, and in Isa 62:4, God is implied as being "married" to her; whereas her "sons" could hardly be said to marry their mother; and in Isa 49:18, they are said to be her bridal ornaments, not her husband. The plural form, builders, is used of God in reverence as "husbands" (see on Isa 54:5).
over the bride--in the possession of the bride (Isa 65:19; Jer 32:41; Zep 3:17).
isa 62:6I--Isaiah speaking in the person of the Messiah.
watchmen upon . . . walls--image from the watches set upon a city's wall to look out for the approach of a messenger with good tidings (Isa 52:7-8); the good tidings of the return of the Jewish exiles from Babylon, prefiguring the return from the present dispersion (compare Isa 21:6-11; Isa 56:10; Eze 3:17; Eze 33:7). The watches in the East are announced by a loud cry to mark the vigilance of the watchmen.
ye that . . . mention . . . Lord--Hebrew, "ye that are the Lord's remembrancers"; God's servants who by their prayers "put God in remembrance" of His promises (Isa 43:26); we are required to remind God, as if God could, which He cannot, forget His promises (Psa 119:49; Jer 14:21).
isa 62:7no rest--Hebrew, "silence"; keep not silence yourselves, nor let Him rest in silence. Compare as to Messiah Himself, "I will not hold . . . peace . . . not rest" (Isa 62:1); Messiah's watchmen (Isa 62:6-7) imitate Him (Isa 62:1) in intercessory "prayer without ceasing" for Jerusalem (Psa 122:6; Psa 51:18); also for the spiritual Jerusalem, the Church (Luk 18:1, Luk 18:7; Rom 1:9).
a praise--(See on Isa 61:11; Zep 3:20).
isa 62:8sworn by . . . right hand--His mighty instrument of accomplishing His will (compare Isa 45:23; Heb 6:13).
sons of . . . stranger--Foreigners shall no more rob thee of the fruit of thy labors (compare Isa 65:21-22).
isa 62:9eat . . . and praise--not consume it on their own lusts, and without thanksgiving.
drink it in . . . courts--They who have gathered the vintage shall drink it at the feasts held in the courts surrounding the temple (Deu 12:17-18; Deu 14:23, &c.).
isa 62:10What Isaiah in the person of Messiah had engaged in (Isa 62:1) unrestingly to seek, and what the watchmen were unrestingly to pray for (Isa 62:7), and what Jehovah solemnly promised (Isa 62:8-9), is now to be fulfilled; the Gentile nations are commanded to "go through the gates" (either of their own cities [ROSENMULLER] or of Jerusalem [MAURER]), in order to remove all obstacles out of "the way of the people (Israel)" (see on Isa 7:14; Isa 40:3; Isa 52:10-12).
standard--for the dispersed Jews to rally round, with a view to their return (Isa 49:22; Isa 11:12).
isa 62:11salvation--embodied in the Saviour (see Zac 9:9).
his work--rather, recompense (Isa 40:10).
isa 62:12Sought out--Sought after and highly prized by Jehovah; answering to "not forsaken" in the parallel clause; no longer abandoned, but loved; image from a wife (Isa 62:4; Jer 30:14).
Messiah, approaching Jerusalem after having avenged His people on His and their enemies, is represented under imagery taken from the destruction of "Edom," the type of the last and most bitter foes of God and His people (see Isa 34:5, &c.).