Revelation 21:27

And there shall no more enter into it any thing unclean, or that practises abomination and lying; but only those who are written in the book of life of the Lamb.

Revelation 22:14-15

Blessed are they who keep his commandments, that they may have authority to approach unto the tree of life, and that they may enter in by the gates into the city.

Treasury of Scripture Knowledge

Summary

Now the building that was before the separate place at the end toward the west was seventy cubits broad; and the wall of the building was five cubits thick round about, and the length thereof ninety cubits.

Bible References

Separate

Revelation 21:27
And there shall no more enter into it any thing unclean, or that practises abomination and lying; but only those who are written in the book of life of the Lamb.
Revelation 22:14
Blessed are they who keep his commandments, that they may have authority to approach unto the tree of life, and that they may enter in by the gates into the city.