Narrated Anas (RA): While the Prophet (peace be upon him) was delivering the Khutba on a Friday, a man stood up and said, “O, Allah’s Apostle! The livestock and the sheep are dying, so pray to Allah for rain.” So he (the Prophet) raised both his hands and invoked Allah (for it).
Sahih al-Bukhari, Book 11, Hadith 56
