(18) باب صَلاَةِ الاِسْتِسْقَاءِ رَكْعَتَيْنِ
Narrated `Abbad bin Tamim from his uncle who said:
"The Prophet (ﷺ) invoked Allah for rain and offered a two rak`at prayer and he put his cloak inside out."
Reference: Sahih al-Bukhari 1026
In-book reference: Book 15, Hadith 21
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 17, Hadith 138