Where can I find in the Bible a verse that mentions the existence of purgatory?

A friend of mine does not believe in purgatory saying it is not found in the Bible. I 'd like to tell her that what she says is wrong, but I can’t find a verse to support my belief. Where can I find a verse in the Bible that mentions the existence of purgatory?

These links should give you the answers that you need. If you have any further questions or concerns that are not answered by this, please contact Catholic Answers directly.
Recommended Reading:
Is believing in Purgatory optional?**
]* Is Purgatory Found in the Bible? by Christine Pinheiro and Kenneth J. Howell**
]* Purgatory in all but Name by W. Robert Anfill**
]* Final Purification**
]* Purgatory by Rev. William G. Most**
]* Purgatory**
]**The Roots of Purgatory (Fathers)**

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