Ibn Abbas said: Abu Bakr said: “O Messenger of Allah, you have grayed!” He said: 'I have been made gray-haired by Hud (Al-Qur'an; 11)), the calamity (Al-Qur'an; 56)), the winds sent forth (Al-Qur'an; 77)). what will they question one another about?’ (Al-Qur'an; 74)). and ‘when the sun is overthrown’ (Al-Qur'an; 81)'."