Yazid bin Hayan Taimi (may Allah have mercy on him) says: I, Husain bin Sabrah, and Umar bin Muslim went to Sayyiduna Zaid bin Arqam (may Allah be pleased with him). When we sat with him, Husain said:“O Zaid! You have attained much goodness, you have seen the Messenger of Allah (peace and blessings be upon him), you have heard his hadiths, you have fought jihad with him, you have prayed with him. Zaid! You have indeed attained much goodness. Zaid! Please narrate to us the hadiths you heard from the Messenger of Allah (peace and blessings be upon him).”He said:“O nephew! I have grown old, and it has been a long time since I kept the company of the Messenger of Allah (peace and blessings be upon him), and of the hadiths of the Messenger of Allah (peace and blessings be upon him) that I had memorized, I have forgotten some of them. So, whatever I narrate to you, accept it, and do not burden me regarding what I am unable to narrate.”Then he said: The Messenger of Allah (peace and blessings be upon him) stood up to address at Ghadir Khumm, which is between Makkah and Madinah, and he praised and glorified Allah, and gave admonition and advice, and then said:“Amma ba’du! Behold! O people! I am only a human being. Soon, the messenger of my Lord will come to me, and I will accept his call. Verily, I am leaving among you two precious and valuable things. One of them is the Book of Allah, in it is guidance and light. So hold fast to the Book of Allah and adhere to it.”Thus, the Prophet (peace and blessings be upon him) encouraged adherence to the Book of Allah and urged regarding it. Then he said:“The second thing is my Ahl al-Bayt. I remind you of Allah regarding my Ahl al-Bayt, I remind you of Allah regarding my Ahl al-Bayt, I remind you of Allah regarding my Ahl al-Bayt.”Husain said:“O Zaid! Who are the Ahl al-Bayt of the Prophet (peace and blessings be upon him)? Are his wives not among his Ahl al-Bayt?”He said:“Indeed, his wives are among his Ahl al-Bayt, but the Ahl al-Bayt of the Prophet (peace and blessings be upon him) are those upon whom charity is forbidden.”Husain said:“Who are they?”He said:“They are the family of Ali, the family of Ja’far, and the family of Abbas.”He said:“Is charity forbidden for all of them?”He said:“Yes.”