Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrated that the Prophet (peace and blessings be upon him) prayed for rain, saying: "O Allah, grant us rain that brings relief (from hardship), brings forth produce, covers (everything), comes quickly without delay, and is beneficial and not harmful." Not much time had passed before it began to rain, until everything was flowing, so much so that the people came to him (peace and blessings be upon him) and said: "We are drowning!" So the Messenger of Allah (peace and blessings be upon him) said: "O Allah, around us and not upon us."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10627