Revelation 21:25
In the daytime (for there will be no night there) its gates will never be shut;
Revelation 22:5
And there will be no more night. They will not need the light of a lamp or the light of the sun, for the Lord God will give them light; and they will reign for ever and ever.
Revelation 21:23
And the city has no need of the sun or of the moon to shine on it, for the glory of God gives it light, and its lamp is the Lamb.
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.
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Bible References
For
Revelation 22:5
And there will be no more night. They will not need the light of a lamp or the light of the sun, for the Lord God will give them light; and they will reign for ever and ever.