مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 620
Prayer
Observing Prayer Early in the Period - Section 3
وَعَنْ أَنَسٍ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا كَانَ الْحَرُّ أَبْرَدَ بِالصَّلَاةِ وَإِذَا كَانَ الْبَرْدُ عَجَّلَ. رَوَاهُ النَّسَائِيُّ
Anas said that during the hot weather God’s Messenger delayed the prayer till it was cooler, but in the cold weather he observed it early. Nasa’i transmitted it.
Mishkat al-Masabih, 620صَحِيح (الألباني)