Abu Dawud
Wages
Book Number: 017 / Hadith Number: 3503
Narated By 'Aisha, Ummul Mu'minin : A man bought a slave, and he remained with him as long as Allah wished him to remain. He then found defect in him. He brought his dispute with him to the Prophet (pbuh) and he returned him to him. The man said: Apostle of Allah, my slave earned some wages. The Apostle of Allah (pbuh) then said: Profit follows responsibility.