Sahih Muslim 517
صحيح مسلم#517SahihNu'man b. Bashir reported:The Messenger of Allah (ﷺ) said: Verily the least suffering for the inhabitants of Fire would be for him who would have two shoes and two laces of Fire (on his feet), and with these would boil his brain as boils the cooking vessel, and he would think that he would not see anyone in a more grievous torment than him, whereas he would be in the least torment
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 1:423