These words appear already in Revelation 22:1, where they describe the source of the river of the water of life. Though in that verse the presence of the throne in the holy city is implicit, in the present verse its presence is stated explicitly. We may imagine John’s tour guide drawing his attention specifically to the throne and so impressing on John that its presence is too important to overlook; this throne is the source and cause and centre of all activity and life in the city, Romans 11:36. In fact, the presence of the throne (see on Revelation 4:2–3 for its authority) provides explanation for why nothing accursed can be there; he who sits on the throne (God and the Lamb, Revelation 3:21) will not permit the defeated Deceiver to pollute his city, his Bride, his church.
3 No longer will there be anything accursed, but the throne of God and of the Lamb will be in it, and his servants will worship him.