Narrated Salama bin Al-Akwa’ (may Allah be pleased with him): I gave the pledge of allegiance to the Messenger of Allah (peace and blessings be upon him) (at the event of the Pledge of Ridwan). After that, I went towards the shade of a tree. When the crowd of people lessened, the Prophet (peace and blessings be upon him) said:“O Ibn Akwa’! Will you not give the pledge?”I said,“O Messenger of Allah! I have already given the pledge.”He (peace and blessings be upon him) said:“Even so (do it again).”So I gave the pledge to him again. It was asked,“Abu Muslim (this is the kunyah of Salama bin Al-Akwa’), on what did you pledge allegiance that day?”He said:“On death.”