John sees another sign in heaven, great and amazing: seven angels with seven plagues, which are the last, for with them the wrath of God is finished (v. 1).
He also sees what appears to be a sea of glass mingled with fire and, standing beside it, those who had conquered the beast and its image and the number of its name. They hold harps of God and sing the song of Moses, the servant of God, and the song of the Lamb. They say that the works of the Lord God the Almighty are great and amazing, that his ways are just and true, that he alone is holy and that all nations will come and worship him, for his righteous acts have been revealed (vv. 2-4).
Afterward John sees the sanctuary of the tent of witness opened in heaven. Out of the sanctuary come the seven angels with the seven plagues, clothed in pure, bright linen with golden sashes. One of the four living creatures gives the seven angels seven golden bowls full of the wrath of God, who lives forever and ever. The sanctuary is filled with smoke from the glory of God and from his power, and no one can enter it until the seven plagues of the seven angels are finished (vv. 5-8).