Sahih Muslim
Sahih Muslim 617 a
The recommendation to delay Zuhr (until it has cooled down) in severe heat for one who finds it too hot in route to join the congregation
Arabic hadith text
وَحَدَّثَنِي عَمْرُو بْنُ سَوَّادٍ، وَحَرْمَلَةُ بْنُ يَحْيَى، - وَاللَّفْظُ لِحَرْمَلَةَ - أَخْبَرَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، قَالَ حَدَّثَنِي أَبُو سَلَمَةَ بْنُ عَبْدِ الرَّحْمَنِ، أَنَّهُ سَمِعَ أَبَا هُرَيْرَةَ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم "اشْتَكَتِ 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 "
Translation
Abu Huraira reported
The Messenger of Allah (ﷺ) said: The Fire made a complaint before the Lord saying." O Lord, some parts of mine have consumed the others." So it was allowed to take two exhalations, one exhalation in winter and the other exhalation in summer. That is why you find extreme heat (in summer) and extreme cold (in winter).