Prayer (Kitab Al-Salat): Details of Commencing Prayer
Dawud :: Book 3 : Hadith 1165
Narrated Jabir ibn Abdullah:
The people came to the Prophet (peace_be_upon_him) weeping (due to drought). He said (making supplication): O Allah! give us rain which will replenish us, abundant, fertilising and profitable, not injurious, granting it now without delay. He (the narrator) said: Thereupon the sky became overcast.