Ishaq ibn Ja‘far (a.s.) said to me the following. “One day I was in the presence of my father that Ali ibn ‘Umar ibn Ali asked him this question. “‘May Allah take my soul in service for your cause, “from who should we seek help and the people seek help and assistance after you (leave this world)?” He (The Imam (a.s.) said, you must seek refuge and guidance from the man who has two yellow clothes on him and a twine bunch of hair who will shortly appear to you from this door, opening the both halves of the door with his hand together.” We did not wait very long that there appeared two palms holding both halves of the door and opened them. Thereafter came to us abu Ibrahim (a.s.).”