Mukhtasar Muslim

Abu Huraira (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: The tooth or canine of a disbeliever will be as large as the Uhud mountain, and the thickness of his skin will be the distance of a three-day journey (i.e., the stench of his skin will reach as far as one can travel in three days, or its thickness will be as much as one can travel in three days).