(51) باب صِفَةِ الْجَنَّةِ وَالنَّارِ
Narrated An-Nu`man bin Bashir:
I heard the Prophet (ﷺ) saying, "The least punished person of the (Hell) Fire people on the Day of Resurrection will be a man under whose arch of the feet two smoldering embers will be placed, because of which his brain will boil just like Al-Mirjal (copper vessel) or a Qum-qum (narrow-necked vessel) is boiling with water."
Reference: Sahih al-Bukhari 6562
In-book reference: Book 81, Hadith 151
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 76, Hadith 567