This hadeeth comes under the following chapter: THE HAUGHTY AND THE PROUD WOULD GET INTO THE FIRE OF HELL AND THE HUMBLE AND MEEK WOULD GET INTO PARADISE
It is transmitted on the authority of Abu Huraira that Allaah's Messenger (sallAllaahu alayhi wa sallam) said: The molar tooth of an unbeliever or the canine teeth of an unbeliever will be like Ubud and the thickness of his skin a three night's journey.