(12) باب فِي شِدَّةِ حَرِّ نَارِ جَهَنَّمَ وَبُعْدِ قَعْرِهَا وَمَا تَأْخُذُ مِنَ الْمُعَذَّبِينَ
Samura b. Jundub reported Allah's Messenger (ﷺ) as saying:
There would be among them those to whom the fire will reach up to their ankels and to some of them the fire would reach their knees and to some it would reach their waists and to some it would reach up to their collar-bones.
Reference: Sahih Muslim 2845 b
In-book reference: Book 53, Hadith 39
USC-MSA web (English) reference(deprecated numbering scheme): Book 40, Hadith 6816