Tafsir Ibn Kathir -> Surah Al-Qari'ah -> Two Sahihs that the Messenger of Allah said,

«اشْتَكَتِ النَّارُ إِلَى رَبِّهَا فَقَالَتْ: يَا رَبِّ أَكَلَ بَعْضِي بَعْضًا، فَأَذِنَ لَهَا بِنَفَسَيْنِ: نَفَسٍ فِي الشِّتَاءِ، وَنَفَسٍ فِي الصَّيْفِ، فَأَشَدُّ مَا تَجِدُونَ فِي الشِّتَاءِ مِنْ بَرْدِهَا، وَأَشَدُّ مَا تَجِدُونَ فِي الصَّيْفِ مِنْ حَرِّهَا»

(The Hellfire complained to its Lord and said, "O Lord! Some parts of me devour other parts of me.'' So He (Allah) permitted it to take two breaths: one breath in the winter and one breath in the summer. Thus, the most severe cold that you experience in the winter is from its cold, and the most severe heat that you experience in the summer is from its heat. ) In the Two Sahihs it is recorded that he said,

«إِذَا اشْتَدَّ الْحَرُّ فَأَبْرِدُوا عَنِ الصَّلَاةِ، فَإِنَّ شِدَّةَ الْحَرِّ مِنْ فَيْحِ جَهَنَّم»

(When the heat becomes intense pray the prayer when it cools down, for indeed the intense heat is from the breath of Hell.) This is the end of the Tafsir of Surat Al-Qari`ah, and all praise and thanks are due to Allah.