Musnad Abu Ya'la al-Mawsili 149:55

'Abd al-'Aziz al-'Umari narrated to us, Ibrahim narrated to me, from al-Zuhri, from 'Amrah, from 'A'ishah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "The hand is cut off for a quarter of a dinar and upwards."