Musannaf Ibn Abi Shayba 19:73

Abu Bakr narrated to us, he said: Aswad bin ‘Amir narrated to us, from Hammad bin Salamah, from Yahya bin Sa’id, that ‘Umar bin ‘Abd al-‘Aziz and al-Qasim said: "The runaway slave, if he steals, his hand is cut off."