عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم أَنَّهُ قَالَ " إِذَا اشْتَدَّ الْحَرُّ فَأَبْرِدُوا عَنِ الصَّلاَةِ، فَإِنَّ شِدَّةَ الْحَرِّ مِنْ فَيْحِ جَهَنَّمَ ".
Abu Hurairah reported from the Messenger of Allah ﷺ that he said, “When the heat becomes intense, delay the prayer until it is cooler, for the intensity of the heat is from the raging heat of Hell.”
also in Sahih al-Bukhari 534, Sahih al-Bukhari 536, Sahih al-Bukhari 537