A Rainy Miracle

Narrated Anas: A man came to the Prophet on a Friday while he (the
Prophet) was delivering a sermon at Medina, andsaid, "There is lack of
rain, so please invoke your Lord to bless us with the rain." The
Prophet looked at the sky when no cloud couldbe detected. Then he
invoked Allah for rain. Clouds started gathering together and it
rained till the Medina valleys started flowing with water. It
continued raining till the next Friday. Then that man (or some other
man) stood up while the Prophet was delivering the Friday sermon, and
said, "We are drowned; Please invoke your Lord to withhold it (rain)
from us" The Prophet smiled and said twice or thrice, "O Allah! Please
let it rain round about usand not upon us." The clouds started
dispersingover Medina to the right and to the left, and it rained
round about Medina and not upon Medina. Allah showed them (the people)
the miracle of His Prophet and His response to his invocation.
Source: Sahih Bukhari Volume 8, Book 73, Number 115