I heard Harb bin Hasan Tahan that Yahya bin Hasan Alawi has narrated a tradition that Yahya bin Masawar said: I was present in a gathering of Shia people and Ali bin Hamza was among them. I heard him say: Ali bin Yaqtin came to Abul Hasan Musa (a.s) and posed some queries to him. The Imam gave replies to him. After that Abul Hasan (a.s) said: O Ali, your companion would kill me. Ali bin Yaqtin began to weep and said: Master, am I also with him? Imam (a.s) replied: You are not with him and you will not see me being killed. Ali said: Master, who is the Imam after you? He replied: My son, Ali is the best of those who would survive me. His position to me is like my position with my father; and he is having all the knowledge that Shia are in need of. [He is knowledgeable about every matter]. He is the chief and leader in the world and the hereafter and is from the proximate ones of the court of Almighty Allah. Yahya bin Hasan Harb said: Thus what caused Ali bin Abi Hamza to keep away from Imam Ali Ridha (a.s) and to be jealous of him? Harb replied: I asked the same thing from Yahya bin Masawar and he said: He refused to hand over to Imam Ali Ridha (a.s) that which he was having from the wealth of Imam Musa Kadhim (a.s) and that is why Almighty Allah deemed him unfortunate in the world as well as the hereafter.