Jami` at-Tirmidhi, Book 47, Hadith 3476 (In-Book) ⓘ
Narrated Abu Sa'eed Al-Khudri: that the Prophet said: "Therein they will grin, with displaced lips... (23:103) - he said - "He will be broiled by the Fire, such that his upper lip will shrink until it reaches the middle of his head, and his lower lip will droop until it is near his navel."
حَدَّثَنَا سُوَيْدُ بْنُ نَصْرٍ، أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ الْمُبَارَكِ، عَنْ سَعِيدِ بْنِ يَزِيدَ أَبِي شُجَاعٍ، عَنْ أَبِي السَّمْحِ، عَنْ أَبِي الْهَيْثَمِ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ : (وهُمْ فِيهَا كَالِحُونَ ) قَالَ " تَشْوِيهِ النَّارُ فَتَقَلَّصُ شَفَتُهُ الْعُلْيَا حَتَّى تَبْلُغَ وَسَطَ رَأْسِهِ وَتَسْتَرْخِي شَفَتُهُ السُّفْلَى حَتَّى تَضْرِبَ سُرَّتَهُ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ غَرِيبٌ .
also referenced under: Hadith 3176 (Reference) & Volume 5, Book 44, Hadith 3176 (DarusSalam)