It is narrated from Hazrat Abdullah bin Abi Bakr that the Messenger of Allah (peace and blessings be upon him) said on the night of Aqabah, "Select twelve men from among yourselves to come to me, who will be guarantors for their respective tribes, just as the disciples of Jesus son of Mary were guarantors." So, the guarantors from Banu Najjar... Ibn Idris says: Banu Najjar were maternal uncles of the Messenger of Allah (peace and blessings be upon him)... were As‘ad bin Zurarah and Abu Umamah. And the two naqibs (guarantors) of Banu Harith bin Khazraj were Hazrat Abdullah bin Rawahah and Sa‘d bin Rabi‘. And the two naqibs of Banu Salamah were Hazrat Abdullah bin Amr (may Allah be pleased with him) bin Haram and Hazrat Bara’ bin Ma‘rur. And the two naqibs of Banu Sa‘idah were Hazrat Sa‘d bin ‘Ubadah and Hazrat Mundhir bin Amr. And the naqib of Banu Zuraiq was Rafi‘ bin Malik. And the naqib of Banu ‘Awf bin Khazraj... these people were known by the title of Qawaqil... was ‘Ubadah bin Samit. And the two naqibs of Banu ‘Abd al-Ashhal were Hazrat Usayd bin Hudayr and Hazrat Abu al-Haytham bin Tayhan. And the naqib of Banu ‘Amr bin ‘Awf was Hazrat Sa‘d bin Khaythamah.