“Once my brother Isma’eel bin Ammar described his faith and beliefs to Abu Abdullah as-Sadiq (as) by saying: “I witness that there is no god but Allah and that Muhammad is the messenger of Allah…” Then he declared his faith in the imams, one after the other until he reached Imam Abu Abdullah as-Sadiq (as) and then he said: “…and I witness that Issma’eel (Imam as-Sadiq’s son) is the imam after you.” Abu Abdullah as-Sadiq (as) said: “No, Issma’eel is not the imam after me.”