Revelation 15

1 And I saw another sign in heaven, great and marvellous, seven angels having the seven last plagues; for in them is filled up the wrath of God.

Then I saw another amazing, important sign in heaven. Seven angels held the seven last plagues which complete God's judgment.

2 And I saw as it were a sea of glass mingled with fire: and them that had gotten the victory over the beast, and over his image, and over his mark, [and] over the number of his name, stand on the sea of glass, having the harps of God.

I saw what looked like a sea of glass mixed with fire. Standing beside the sea of glass were those who had defeated the beast and his image and the number of his name. They had harps given to them by God

3 And they sing the song of Moses the servant of God, and the song of the Lamb, saying, Great and marvellous [are] thy works, Lord God Almighty; just and true [are] thy ways, thou King of saints.

and they sang the song of Moses, the servant of God, and the song of the Lamb: “What you have done is tremendous and marvelous, Lord God, the All-powerful One. Your ways are right and true, King of the nations.

4 Who shall not fear thee, O Lord, and glorify thy name? for [thou] only [art] holy: for all nations shall come and worship before thee; for thy judgments are made manifest.

Who would not be in awe of you, Lord? Who would not glorify your name? For only you are holy. All nations will come and worship you because you have demonstrated by your actions that you do what is right!”

5 And after that I looked, and, behold, the temple of the tabernacle of the testimony in heaven was opened:

After this I looked and the Temple of the “Tent of Witness” was opened.

6 And the seven angels came out of the temple, having the seven plagues, clothed in pure and white linen, and having their breasts girded with golden girdles.

Out of the Temple came the seven angels who held the seven plagues, wearing clean, white linen clothes and golden sashes on their chests.

7 And one of the four beasts gave unto the seven angels seven golden vials full of the wrath of God, who liveth for ever and ever. (aiōn g165)

One of the four living creatures gave to the seven angels seven golden bowls full of the judgment of God, who lives for ever and ever. (aiōn g165)

8 And the temple was filled with smoke from the glory of God, and from his power; and no man was able to enter into the temple, till the seven plagues of the seven angels were fulfilled.

The Temple was filled with smoke that came from the glory of God and from his power. Nobody was able to enter the Temple until the seven plagues that came from the seven angels were over.