A.T. Robertson Commentary Revelation 21:22

"And I saw no temple therein: for the Lord God the Almighty, and the Lamb, are the temple thereof." — Revelation 21:22 (ASV)

I saw no temple therein (ναον ουκ ειδον εν αυτη). "Temple I did not see in it." The whole city is a temple in one sense (verse 16), but it is something more than a temple even with its sanctuary and Shekinah Glory in the Holy of Holies.

For the Lord God the Almighty, and the Lamb are the temple thereof (ο γαρ Κυριος ο θεος ο παντοκρατωρ, ναος αυτης εστιν κα το αρνιον). "For the Lord God, the Almighty, is the sanctuary of it and the Lamb." The Eternal Presence is the Shekinah Glory of God (verse 3). In 2 Corinthians 6:16 we are the sanctuary of God here, but now God is our Sanctuary, and so is the Lamb as in chapters Re 4; 5. See 1:8 and often for the description of God here.