Hadith of the Quran and Sunnah authenticity. The Shi'a claim that this hadith is the most authentic of hadiths, claiming that it has been narrated by over 35 companions of Muhammad. The "Hadith al-Thaqalayn" is used by the Shi'a, among other reasons, to support their belief of Ali's succession to Muhammad. Shi'as view this hadith as a clear indication that Muhammad wished to keep the matter of leadership within his own family, starting with his cousin Ali. They believe that Muhammad was clearly indicating that only the "Ahl al-Bayt" have a right to authority and leadership. It is based on this claim that the Shi'as reject
Hadith of the Quran and Sunnah single manner. The hadith also refutes the shi'a tradition that the wives of the Prophet are not part of ahlul bayt. Because the truth of the matter is that Zaid clearly says, "His wives are the members of his family...". It is true that he mentions that the hadith is pertaining to Ali, Aqil, and Jafar, and all their offsprings; but, as is the well-known position in the sunni tradition, a companion or anyone other than the prophet can not make official any ruling or opinion. Zaid did not tell why he believes the hadith is pertaining only to Ali,