وَعَنْ أَنَسٍ
قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: إِذَا اشْتَدَّ الْبَرْدُ بَكَّرَ بِالصَّلَاةِ وَإِذَا اشْتَدَّ الْحَرُّ أَبْرَدَ بِالصَّلَاةِ. يَعْنِي الْجُمُعَةَ
When it was very cold the Prophet (sallallahu alayhi wa sallam) observed the prayer early, and when it was very hot he delayed the prayer till it was cooler. The reference is to the Friday prayer.
Mishkat al-Masabih 1326, Book 5, Prayer, Hadith 804. 1 min read