Abu Umamah reported: The Messenger of Allah, peace and blessings be upon him, said, “The sun will be lowered on the Day of Resurrection to the distance of a mile and its heat will be increased by as much. It will boil skulls just like the boiling of pots. They will sweat by the measure of their sins. Among them are those to whom it will reach their ankles, among them are those to whom it will reach their shins, among them are those to whom it will reach their midsections, and among them are those who are subsumed in sweat.”
Source: Musnad Aḥmad 22186
Grade: Qawi (strong) according to Al-Arna’ut
عَنْ أَبِي أُمَامَةَ أَنَّ رَسُولَ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ قَالَ تَدْنُو الشَّمْسُ يَوْمَ الْقِيَامَةِ عَلَى قَدْرِ مِيلٍ وَيُزَادُ فِي حَرِّهَا كَذَا وَكَذَا يَغْلِي مِنْهَا الْهَامُّ كَمَا تَغْلِي الْقُدُورُ يَعْرَقُونَ فِيهَا عَلَى قَدْرِ خَطَايَاهُمْ مِنْهُمْ مَنْ يَبْلُغُ إِلَى كَعْبَيْهِ وَمِنْهُمْ مَنْ يَبْلُغُ إِلَى سَاقَيْهِ وَمِنْهُمْ مَنْ يَبْلُغُ إِلَى وَسَطِهِ وَمِنْهُمْ مَنْ يُلْجِمُهُ الْعَرَقُ
22186 مسند أحمد بن حنبل
22186 المحدث شعيب الأرناؤوط خلاصة حكم المحدث إسناده قوي