Q. What scriptures support the Doctrine of Purgatory?
A. I cannot give any scripture that categorically teaches the Doctrine of Purgatory that would satisfy a sola scriptura Christian. I can show you Scriptures that imply the existence of the doctrine. I can show you writings of the early Church Fathers, written before the Bible was even canonized, that teach the Doctrine of Purgatory. I can show you that the concept, of the need for purification, after death and before attaining Heaven, has roots in the Jewish Faith. Click on this link–>Sola Scriptura & Purgatory Then follow all the links on that page.
If you are able to believe it is possible to sit down, 2000 years after the birth of Jesus and read scripture and interpret it infallibly all by yourself, disregarding historic Christian beliefs in the years immediately following the death of the apostles, you have more faith than I do. But, by what authority can you claim infallibility? Because, if you are convinced that you can interpret scripture without error, even without saying it openly, you must believe you are able to interpret infallibly.