Sahih Bukhari | Volume 2 | Hadith Number 139

Narrated by Abbas bin Tamim
From his uncle who said, "The Prophet went out to the Musalla to offer the Istisqa' prayer, faced the Qibla and offered a two-Rakat prayer and turned his cloak inside out." Narrated Abu Bakr, "The Prophet put the right side of his cloak on his left side."