صحيح البخاري
Sahih Bukhari
كتاب مواقيت الصلاة
The Book of The Times of As-Salat (The Prayers) and Its Superiority
بَابُ الإِبْرَادِ بِالظُّهْرِ فِي شِدَّةِ الْحَرِّ:
(9) Chapter. In severe heat, offer Zuhr prayers when it becomes (a bit) cooler.
Hadith 537
وَاشْتَكَتِ النَّارُ إِلَى رَبِّهَا ، فَقَالَتْ : يَا رَبِّ أَكَلَ بَعْضِي بَعْضًا ، فَأَذِنَ لَهَا بِنَفَسَيْنِ نَفَسٍ فِي الشِّتَاءِ وَنَفَسٍ فِي الصَّيْفِ ، فَهُوَ أَشَدُّ مَا تَجِدُونَ مِنَ الْحَرِّ ، وَأَشَدُّ مَا تَجِدُونَ مِنَ الزَّمْهَرِيرِ " .
The Hell-fire of Hell complained to its Lord saying: O Lord! My parts are eating (destroying) one another. So Allah allowed it to take two breaths, one in the winter and the other in the summer. The breath in the summer is at the time when you feel the severest heat and the breath in the winter is at the time when you feel the severest cold."
