Arabic (Original)
وَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَبْرِدُوا مِنْ الْحَرِّ فِي الصَّلَاةِ فَإِنَّ شِدَّةَ الْحَرِّ مِنْ فَيْحِ جَهَنَّمَ.
English Translation
The Messenger of Allah (peace be upon him) said: 'Delay the prayer when it is very hot until it cools down, for the intensity of heat is from the breath of Hellfire.'