Volume 2, Book 17, Number 137:
Narrated Abbas bin Tamim from his uncle,
“I saw the Prophet on the day when he went out to offer the Istisqa’ prayer. He turned his back to –
wards the people and faced the Qibla and asked Allah for rain. Then he turned his cloak inside out
and led us in a two Rakat prayer and recited the Qur’an aloud in them.”