(91) باب أَهْوَنِ أَهْلِ النَّارِ عَذَابًا
Abu Sa'id al-Khudri reported:
Verily, the Messenger of Allah (ﷺ) said: The least tormented of the inhabitants of the Fire would be he who would wear two shoes of Fire and his brain would boil on account of the heat of the shoes.
Reference: Sahih Muslim 211
In-book reference: Book 1, Hadith 422
USC-MSA web (English) reference(deprecated numbering scheme): Book 1, Hadith 412