Musnad Ahmad 30:1473

Hassan ibn Musa narrated to us, Ibn Lahi'ah narrated to us, Abd Rabbih ibn Sa'id narrated to us, from al-Maqburi, from Abu Hurairah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "No one shall enter the Fire except a wretched one." It was said: "And who is the wretched one?" He said: "The one who does not perform an act of obedience, and does not abandon a sin for the sake of Allah."