Sahih al-Bukhari 1017

It is related that Anas ibn Malik said, "A man came to the Messenger of Allah, may Allah bless him and grant him peace, and said, 'Messenger of Allah, our livestock is dying and the roads are blocked, so pray to Allah.' The Messenger of Allah, may Allah bless him and grant him peace, made supplication and it rained from one Jumu'a to another. A man came to the Messenger of Allah, may Allah bless him and grant him peace, and said, 'Messenger of Allah, our houses are being destroyed, the roads are blocked and livestock is dying.' So the Messenger of Allah, may Allah bless him and grant him peace, said, 'O Allah, on the tops of the mountains, the hill tops, in the valleys and the places where trees grow.' The clouds peeled away from Madina like clothes that had been taken off."