“I asked abu Ja‘far (a.s.), ‘Why is he (Ali ibn abu Talib (a.s.) is called Amir al-Mu’minin (a.s.)?” He said, “Allah has given him this name and as such it has come in His book, “When your Lord asked all the offspring of Adam (before their birth), “Am I not your Lord?” All of them testified and bore witness to their testimony that on the Day of Judgment they would not say, “We were not aware of this (fact),.” (7:172) that Muhammad is My messenger and Ali is Amir al-Mu’minin (commander of the faithful).”