Nu`man bin Bashir (May Allah be pleased with them) reported: Messenger of Allah (sallallaahu ’alayhi wa sallam) said, “The least tortured man on the Day of Resurrection is one underneath whose feet will be placed two live coal, and his brain will be boiling, and he would think that he is the most tortured, while he is the least tortured.”
[Al-Bukhari and Muslim].
According to the narration in Muslim, the straps of shoes to be worn by the inhabitants of Hell would be of fire which will make their brains boil like a cooker placed in an oven. Some narrators have stated that the man alluded to will be Abu Talib, the real uncle of the Prophet (sallallaahu ’alayhi wa sallam) and his most kind and sympathetic supporter. But since he had died as a polytheist, he will be sent to Hell. May Allah save us from it.
[Riyad as-Saliheen, Book of Miscellany, Chapter 50, Hadith 398]