This difference between following either the Ahl al-Bayt (Muhammad's family and descendants) or Caliph Abu Bakr has shaped Shia and non-Shia views on some of the Quranic verses, the hadith (narrations from Muhammad) and other areas of Islam. For instance, the collection of hadith venerated by Shia Muslims is centered on narrations by members of the Ahl al-Bayt and their supporters, while some hadith by narrators not belonging to or supporting the Ahl al-Bayt are not included. Those of Abu Hurairah, for example, Ibn Asakir in his Ta'rikh Kabir and Muttaqi in his Kanzu'l-Umma report that Caliph Umar lashed him, rebuked him and forbade him to narrate hadith from Muhammad. Umar said: "Because you narrate hadith in large numbers from the Holy Prophet, you are fit only for attributing lies to him. (That is, one expects a wicked man like you to utter only lies about the Holy Prophet.) So you must stop narrating hadith from the Prophet; otherwise, I will send you to the land of Dus." (A clan in Yemen, to which Abu Huraira belonged.) According to Sunnis, Ali was the fourth successor to Abu Bakr, while the Shia maintain that Ali was the first divinely sanctioned "Imam", or successor of Muhammad. The seminal event in Shia history is the martyrdom in 680 CE at the Battle of Karbala of Ali's son Hussein ibn Ali, who led a non-allegiance movement against the defiant caliph (71 of Hussein's followers were killed as well).