Musannaf Ibn Abi Shayba 13:2595

Abu Bakr narrated to us, he said: Yazid ibn Harun narrated to us, he said: Ibn 'Awn, Hisham, and Ash'ath informed us, from Muhammad, from Shurayh, regarding the slave who is sold while he has a debt: his debt is upon the one who sold him and consumed his price.