Musnad Ahmad 1153:995

Sa'id ibn Mansur narrated to us, he said: Ya'qub ibn 'Abd al-Rahman narrated to us, from 'Amr ibn Abi 'Amr, from al-Muttalib ibn 'Abd Allah, from 'Aisha, that the Prophet, peace and blessings of Allah be upon him, said: "Indeed, a man may attain by his good character the rank of the one who fasts and stands in prayer."