Exiting Hellfire After Burning Of Sins
The point under consideration is not whether it will stay forever or not, the actual point is that it is all subject to Allah’s mashiyat because if God had made a promise in Quran just like He did with Jannah, then there would have been no doubt about its eternity. Since Allah himself left the room open for His mashiyat to intervene in case of hell, therefore there is a room that His mashiyat can put an end to it (just a possibilit), if He so wills. (See Quran 6:128 And 11:105-108 )