And out of the temple came the seven angels with the seven plagues, dressed in clean and bright linen and girded with golden sashes around their chests.
Observe, I. How these angels appeared - coming out of heaven to execute their commission: The temple of the tabernacle of the testimony in heaven was opened, Rev 15:5. Here is an allusion to the holiest of all the tabernacle and temple, where was the mercy-seat, covering the ark of the testimony, where the high priest made intercession, and God communed with his people, and heard their prayers.
Commenting on Revelation 15:5-8
And the seven angels came out of the temple,.... By which it appears, that they are such who are of, or belong to the church of Christ; and are either ministers, or members of churches, who will be the executioners of God's wrath upon the beast, and his followers; some copies, and the Complutensian edition, read, "out of heaven": having the seven plagues; that is...
Verse 6. And the seven angels. . Came out of the temple. Were seen to come from the temple; that is, from the immediate presence of God. Having the seven plagues. . 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.