Musnad Ahmad 30:1390

'Affan narrated to us, Wuhayb narrated to us, Muhammad ibn 'Ajlan narrated to us, from Bukayr ibn 'Abdullah ibn al-Ashajj, from 'Ajlan, the father of Muhammad, from Abu Hurayrah, from the Prophet, peace and blessings of Allah be upon him, who said: "The slave has his food and his clothing, and he shall not be burdened with work that he cannot bear."