Albert Barnes Commentary Revelation 15:6

"and there came out from the temple the seven angels that had the seven plagues, arrayed with [precious] stone, pure [and] bright, and girt about their breasts with golden girdles." — Revelation 15:6 (ASV)

And the seven angels. See the notes on Revelation 15:1.

Came out of the temple. They were seen to come from the temple; that is, from the immediate presence of God.

Having the seven plagues. See the notes on Revelation 15:1.

Each one entrusted with a single "plague" to be executed upon the earth. The meaning here is that they were designated or appointed to execute those plagues in judgments. The symbols of their office—the golden vials—were given to them afterwards (Revelation 15:7).

Clothed in pure and white linen. This is the emblem of holiness—the common representation in regard to the heavenly inhabitants. See the notes on Revelation 3:4 and Revelation 7:13.

Compare Matthew 17:2; Luke 9:29; Mark 16:5.

And having their breasts girded with golden girdles. See the notes on Revelation 1:13.

The meaning is that they were attired in a manner befitting their rank and condition.