Isaiah 4:3

“And it shall come to pass, [that he that is] left in Zion, and [he that] remaineth in Jerusalem, &c.] These are the persons to whom Christ appears beautiful and glorious, excellent and comely, who will be left, and remain in Zion and Jerusalem; by which is meant the Gospel church, or church as in the latter day; in which these shall continue, abide by the truths and doctrines of the Gospel, and the ordinances thereof, and persevere unto the end; even when Christ shall take his fan in his hand, and purge his floor of the chaff; when the filth of the daughter of Zion shall be washed away by the spirit of judgment and burning, as in the following verse (<230404>Isaiah 4:4); when it shall be a…”

“left in Zion--equivalent to the "escaped of Israel" (Isa 4:2). shall be called--shall be (Isa 9:6). holy-- (Isa 52:1; Isa 60:21; Rev 21:27). written--in the book of life, antitypically (Phi 4:3; Rev 3:5; Rev 17:8). Primarily, in the register kept of Israel's families and tribes. living--not "blotted out" from the registry, as dead; but written there as among the "escaped of Israel" (Dan 12:1; Eze 13:9). To the elect of Israel, rather than the saved in general, the special reference is here (Joe 3:17).”

“He that is left in Zion - This “properly” refers to the remnant that should remain after the mass of the people should be cut off by wars, or be borne into captivity. If it refer to the few that would come back from Babylon, it means that they would be reformed, and would be a generation different from their fathers - which was undoubtedly true. If it refer, as the connection seems to indicate, to the times of the Messiah, then it speaks of those who are ‘left,’ while the great mass of the nation would be unbelievers, and would be destroyed. The mass of the nation would be cut off, and the remnant that was left would be holy; that is, all true friends of the Messiah would be holy. Shall be…”

“Holy - Shall be really holy. Jerusalem - Of the people living in or belonging to Jerusalem. Isaiah 4:4”

“4:3 To be holy was the requirement for citizenship in Zion, where God dwells in his glorious majesty (see 6:3; Heb 12:14). • The remnant would have their names recorded among the living in the Book of Life (Exod 32:32; Dan 12:1; Mal 3:16; Rev 3:5; 20:12).”

“shall be: Isa 1:27, Isa 52:1, Isa 60:21; Eze 36:24-28, Eze 43:12; Zac 14:20, Zac 14:21; Eph 1:4; Col 3:12; Heb 12:14; Pe1 2:9 written: Exo 32:32, Exo 32:33; Eze 13:9; Luk 10:20; Phi 4:3; Rev 3:5, Rev 13:8, Rev 17:8, Rev 20:15; Rev 21:27 among the living: or, to life, Act 13:48 Isaiah 4:4”

“"And it will come to pass, whoever is left in Zion and remains in Jerusalem, holy will he be called, all who are written down for life in Jerusalem." The leading emphasis of the whole v. rests upon kadosh (holy). Whereas formerly in Jerusalem persons had been distinguished according to their rank and condition, without any regard to their moral worth ( Isa 3:1-3, Isa 3:10-11; cf., Isa 32:5); so the name kadosh (holy) would now be the one chief name of honour, and would be given to every individual, inasmuch as the national calling of Israel would now be realized in the persons of all ( Exo 19:6, etc.). Consequently the expression "he shall be called" is not exactly equivalent to "he shall…”