Sahih Bukhari
Invocations
Volume: 008 / Book Number: 075 / Hadith Number: 354
Narrated 'Abdullah bin Zaid:
Allah's Apostle went out to this Musalla (praying place) to offer the prayer of Istisqa.' He invoked Allah for rain and then faced the Qibla and turned his Rida' (upper garment) inside out.