[Shakir 7:172] And when your Lord brought forth from the children of Adam, from their backs, their descendants, and made them bear witness against their own souls: Am I not your Lord? They said: Yes! we bear witness. Lest you should say on the day of resurrection: Surely we were heedless of this. Tafseer al-burhaan , Vol 2, pg 47 – Hz Jabar narrates from Imam Muhammed Baqir when was Amir al mumineen called Amir al momineen ? He replied ; “That Allah made him as referred in this Ayat a compact was made with the children of Adam that Allah is their Lord and Muhammed their Prophet and Ali the Amir al- momineen.