Sahih Muslim
The Book Pertaining to Piety and Softening of Hearts (Kitab Al-Zuhd wa Al-Raqaiq)
Book Number: 042 / Hadith Number: 7120
Abu Huraira reported that he heard Allah's Messenger (may peace be upon him) as saying: The servant speaks words for which he is sent down to the Hell-Fire farther than the distance between the cast and the west.