إِذْ قَدْ أَخْبَرَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بِتَبْرِيدِ الظُّهْرِ فِي شِدَّةِ الْحَرِّ، وَقَدْ أَعْلَمَ أَنَّ لَوْلَا ضَعْفُ الضَّعِيفِ، وَسَقَمُ السَّقِيمِ لَأَخَّرَ صَلَاةَ الْعِشَاءِ الْآخِرَةِ إِلَى شَطْرِ اللَّيْلِ.
Because the Prophet Muhammad (peace be upon him) informed about performing the Zuhr prayer later during intense heat, and he also stated that if it were not for considering the weakness of the weak and the illness of the sick, he (peace be upon him) would have delayed the Isha prayer until midnight.