مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 589
Prayer
Observing Prayer Early in the Period - Section 1
وَعَنْ أَنَسٍ قَالَ: كُنَّا إِذَا صَلَّيْنَا خَلْفَ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بِالظَّهَائِرِ سَجَدْنَا على ثيابنا اتقاء الْحر
Anas said, “When we prayed behind the Prophet (ﷺ) at midday in summer we prostrated ourselves on our clothing to protect ourselves from the heat.” (Bukhari and Muslim, the wording being Bukhari’s.)
Mishkat al-Masabih, 589مُتَّفق عَلَيْهِ (الألباني)