We used to pray with the Messenger of Allah ﷺ in intense heat. If one of us could not press his face firmly against the ground, he would spread out his garment and prostrate on it.
حدثنا أحمد بن حنبل حدثنا بشر يعني ابن المفضل حدثنا غالب عن بكر بن عبد الله
كنا نصلي مع رسول الله ﷺ في شدة الحر فإذا لم يستطع أحدنا أن يمكن وجهه من الأرض بسط ثوبه فسجد عليه
Bukhari narrated it in "The Book of Prayer, the chapter on sujud on one's garment during intense heat," hadith no. 385, and Muslim in "The Book of Mosques, the chapter on the recommendation of praying Dhuhr at the beginning of its time when the heat is not intense," hadith no. 620, from the hadith of Bishr bin Mufaddal, through this same chain.