(32) باب اسْتِحْبَابِ الإِبْرَادِ بِالظُّهْرِ فِي شِدَّةِ الْحَرِّ لِمَنْ يَمْضِي إِلَى جَمَاعَةٍ وَيَنَالُهُ الْحَرُّ فِي طَرِيقِهِ
Abu Huraira reported that the Messenger of Allah (ﷺ) said:
This heat is from the exhalation of Hell-fire, so delay the prayer till it is cool.
Reference: Sahih Muslim 615 d
In-book reference: Book 5, Hadith 234
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1287