Sahih al-Bukhari, Book 15, Hadith 21 (In-Book) ⓘ
Narrated `Abbad bin Tamim from his uncle who said: "The Prophet invoked Allah for rain and offered a two rak`at prayer and he put his cloak inside out."
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي بَكْرٍ، عَنْ عَبَّادِ بْنِ تَمِيمٍ، عَنْ عَمِّهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم اسْتَسْقَى فَصَلَّى رَكْعَتَيْنِ، وَقَلَبَ رِدَاءَهُ.
also referenced under: Hadith 1026 (DarusSalam) & Volume 2, Book 17, Hadith 138 (USC-MSA)