Musnad Ahmad 31:723

Hassan narrated to us, Ibn Lahi'ah narrated to us, Darraj narrated to us, from Abu al-Haytham, from Abu Sa'id al-Khudri, from the Messenger of Allah, may Allah bless him and grant him peace, who said: "The disbeliever will be made to stand on the Day of Resurrection for the duration of fifty thousand years, as if he had not done any work in the world. And the disbeliever will see Hell, and he will think that it is about to befall him from a distance of forty years' journey."