The Messenger of Allah ﷺ said, "The person with the lightest punishment among the people of the Fire will wear two sandals of fire, and his brain will boil from the heat of his sandals."
أن رسول الله ﷺ قال: إن أدنى أهل النار عذابا ينتعل بنعلين من نار يغلي دماغه من حرارة نعليه.
Muslim reported it in the book of Iman (211), from Abu Bakr bin Abu Shayba, who said, Yahya bin Abu Bukayr narrated to us, who said, Zuhayr bin Muhammad narrated to us, from Suhayl bin Abu Salih, from Numan bin Abu Ayyash, from Abu Saeed Khudri, who mentioned it.