Albert Barnes Commentary Revelation 21:9

"And there came one of the seven angels who had the seven bowls, who were laden with the seven last plagues; and he spake with me, saying, Come hither, I will show thee the bride, the wife of the Lamb." — Revelation 21:9 (ASV)

And there came to me one of the seven angels, etc. See Barnes on Revelation 16:6-7.

Why one of these angels was employed to make this communication is not stated. It may be that as they had been engaged in bringing destruction on the enemies of the church, and securing its final triumph, there was a propriety that that triumph should be announced by one of their number.

And talked with me. That is, regarding what he was about to show me.

I will show you the bride, the Lamb’s wife. I will show you what represents the redeemed church now to be received into permanent union with its Lord—as a bride about to be united to her husband. See Barnes on Revelation 21:2.

Compare Revelation 19:7-8.

“Lamb’s wife” .