Nu'man bin Sa'd (may Allah have mercy on him) said: I heard Sayyiduna Mughirah bin Shu'bah (may Allah be pleased with him) say that the Messenger of Allah (peace and blessings be upon him) said: "Some people will come out of Hell and enter Paradise, and in Paradise they will be called 'the Jahannamis (the people of Hell)'. They will supplicate to Allah to remove this name from them, and Allah Almighty will erase it from them. Then when they come out of Hell" - then the narrator mentioned the (rest of the) whole hadith.
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 18151