(15) باب الدُّعَاءِ فِي الاِسْتِسْقَاءِ قَائِمًا
Narrated `Abbad bin Tamim:
that his uncle (who was one of the companions of the Prophet) had told him, "The Prophet (ﷺ) went out with the people to invoke Allah for rain for them. He stood up and invoked Allah for rain, then faced the Qibla and turned his cloak (inside out) and it rained."
Reference: Sahih al-Bukhari 1023
In-book reference: Book 15, Hadith 18
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 17, Hadith 135