I asked Abu Abdullah (as): “Who is better; al-Hasan or al-Husayn?” He said: “The virtue of the previous one of us joins the next one of us and the virtue of the next one of us joins the previous one. Each one of us has his virtue.” I said: “May my soul be sacrificed for you! Would you explain the answer more to me because I look for the truth?” He said: “We are from one tree. Allah has created us from one clay. Our virtue and knowledge are from Allah. We are the deputies of Allah over His people, the propagandists for His religion and the means between Allah and His people. Do I say more to you O Zayd?” I said: “Yes!” He said: “Our creation is the same. Our knowledge is the same. Our virtue is the same and we all are the same before Allah.” I asked: “Would you tell me how many you are?” He said: “We are twelve ones. So has been determined around the Throne at the beginning of the Creation. The first of us is Muhammad. The middle is Muhammad and the last of us is Muhammad.”