Revelation 21:27

and nothing that is impure, no one that is guilty of any abomination, or a lye, shall ever enter there: but they alone who are written in the lamb's book of life.

Revelation 22:14-15

blessed are they who wash their robes, that they may have right to the tree of life, and may enter in through 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 nothing that is impure, no one that is guilty of any abomination, or a lye, shall ever enter there: but they alone who are written in the lamb's book of life.
Revelation 22:14
blessed are they who wash their robes, that they may have right to the tree of life, and may enter in through the gates into the city."