The Book of Faith (Kitab Al-Iman)

Muslim :: Book 1 : Hadith 414

Nu'man b. Bashir was delivering an address and saying: I heard the Messenger of Allah (may peace be upon him) say: the least suffering for the inhabitants of Hell on the Day of Resurrection would be for the man under whose soles would be placed two embers and his brain would boil on account of them.