Holding Fast to the Qur'an and Sunnah

Bukhari :: Book 9 :: Volume 92 :: Hadith 446

Narrated 'Ali bin Abi Talib:

That Allah's Apostle came to him and Fatima the daughter of Allah's Apostle at their house at night and said, "Won't you pray?" 'Ali replied, "O Allah's Apostle! Our souls are in the Hands of Allah and when he wants us to get up, He makes us get up." When 'Ali said that to him, Allah's Apostle left without saying anything to him. While the Prophet was leaving, 'Ali heard him striking his thigh (with his hand) and saying, "But man is quarrelsome more than anything else." (18.54)