The city has no need of the sun or the moon to shine on it, for the glory of God gives it light, and its lamp is the Lamb.
In context
21The twelve gates were twelve pearls; each gate was made from a single pearl. And the main street of the city was pure gold, transparent as glass. 22I did not see a temple in the city, for its temple is the Lord God, the Almighty, and the Lamb. 23The city has no need of the sun or the moon to shine on it, for the glory of God gives it light, and its lamp is the Lamb. 24The nations will walk by its light, and the kings of the earth will bring their glory into it. 25Its gates will never be shut by day, and there will be no night there.