Revelation 21:25

the gates of it shall never be shut by day: for no night shall be there.

Revelation 22:5

no night shall be there, nor any need of a lamp, or of the light of the sun; for the Lord God will give them light: and they shall reign for ever and ever.

Revelation 21:23

the city had no need either of the sun, or of the moon to shine in it: for the glory of God did lighten it, and the lamb is the luminary thereof.

Treasury of Scripture Knowledge

Summary

And the gates of it shall not be shut at all by day: for there shall be no night there.

Bible References

For

Revelation 22:5
no night shall be there, nor any need of a lamp, or of the light of the sun; for the Lord God will give them light: and they shall reign for ever and ever.