Musnad Ahmad 30:1831

Sa'id ibn Mansur narrated to us, he said: 'Abd al-'Aziz ibn Muhammad narrated to us, from Muhammad ibn 'Ajlan, from al-Qa'qa' ibn Hakim, from Abu Salih, from Abu Hurayrah, who said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "I was only sent to perfect righteous character."