Muhammad bin al-Aswad bin Khalaf narrates that his father, Sayyiduna al-Aswad (may Allah be pleased with him), was present with the Prophet (peace and blessings be upon him) while the Prophet (peace and blessings be upon him) was taking the pledge of allegiance from the people. Men, women, young and old came to him (peace and blessings be upon him), accepted Islam at his blessed hand and bore witness. Muhammad bin al-Aswad stated: They bore witness that there is no deity except Allah and that Sayyiduna Muhammad (peace and blessings be upon him) is the Messenger of Allah.
Al-Tabarani recorded it in al-Mu'jam al-Kabir and al-Mu'jam al-Awsat, and Ahmad recorded it in abridged form; its narrators are thiqat (trustworthy).