John the Apostle
Revelation 21:23BSB·traditional attribution

And the city has no need of sun or moon to shine on it, because the glory of God illuminates the city, and the Lamb is its lamp.

Jamieson-Fausset-Brown Reformed

in it--so Vulgate. But A, B, and ANDREAS read, "(shine) on it," or literally, "for her." the light--Greek, "the lamp" (Isa 60:19-20). The direct light of God and the Lamb shall make the saints independent of God's creatures, the sun and moon, for light.

John Gill Reformed Baptist

And the nations of them which are saved,.... In distinction from them that will be deceived by Satan, Rev 20:8. These are not all the nations of the world, which will be gathered before Christ, the Judge, for all will not be saved, there is a world that will be condemned; nor the Gentiles only, which shall come into the church state of the Jews...

Matthew Henry Presbyterian

We have already considered the introduction to the vision of the new Jerusalem in a more general idea of the heavenly state; we now come to the vision itself, where observe, I. The person that opened the vision to the apostle - one of the seven angels, that had the seven vials full of the seven last plagues, Rev 21:9.

Commenting on Revelation 21:9-27