Musnad Ahmad 1153:708

Abu Sa'id narrated to us, he said: 'Abdullah ibn Ja'far narrated to us, he said: Yazid ibn 'Abdullah narrated to us, from Abu Bakr ibn Hazm, from 'Aishah, she said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The hand is not to be cut except for a quarter of a dinar and upwards."