“I heard from Yahya ibn Aktham, the judge in the city of Samarra, Iraq his words herein below. It happened only after serious debates, conversations, maintaining good relations and asking him about the knowledge of the members of the family of Muhammad (s.a). He said, “Once when was walking around the grave of the Messenger of Allah I saw Muhammad ibn Ali al-Rida (a.s.) also walk around the grave of the Messenger of Allah. We debated over the issues that I needed to understand. He explained them to me. I then said, “By Allah, I want to ask you a question, but I swear by Allah that I feel shy.” He then said, “I can tell you what you want to ask before you will ask me about it. You want to ask me about Imamat (Leadership with Divine Authority).” I then said, “By Allah, this is it?” He said, “I am he.” I then asked, “Is there any evidence and proof to support it?” He had a staff in his hand and it spoke, “My master certainly is the Imam of this time and he is the Hujja (Leader with Divine Authority)>“