مُوَطَّأُ مَالِكٍ
Muwatta Malik 30
The Times of Prayer
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ إِذَا اشْتَدَّ الْحَرُّ فَأَبْرِدُوا عَنِ الصَّلاَةِ فَإِنَّ شِدَّةَ الْحَرِّ مِنْ فَيْحِ جَهَنَّمَ .
Yahya related to me from Malik from Abu'z Zinad from al-Araj from Abu Hurayra that the Messenger of Allah, (ﷺ), said, "When the heat is fierce, wait until it gets cooler before you do the prayer, for scorching heat is from the blast of Jahannam."
Arabic/English book reference: Book 1, Hadith 29