Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrated: A Bedouin came to the Prophet (peace and blessings be upon him) and said: O Messenger of Allah, by Allah, I have come to you from a people for whom no herdsman carries provisions (for his flock), and no stallion moves about (in the pasture) for them (that is, there is drought). So he (peace and blessings be upon him) ascended the pulpit, praised Allah, and then said: "O Allah, give us rain that brings relief, that makes the land green, that pours abundantly, that spreads everywhere, that comes quickly and is not delayed." Then he (peace and blessings be upon him) came down from the pulpit, and whoever came to us from any direction would say: You have given us life.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12623