Invoking Allah for Rain (Istisqaa)

Bukhari :: Book 2 :: Volume 17 :: Hadith 139

Narrated 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."