Not in the Scriptures either.
Your comment: “Not in the Scriptures either.”
Perhaps you should read Maccabees , or was that one of the books of the Bible that Luther said wasn’t inspired because it didn’t agree with his new man-made religion.
Jesus said that one needs to be perfect to meet God, so one needs to be purified before entering Heaven, thus Purgatory. Matthew 5:48 and other mentions in the bible.