Abu Dawud Book 11, Hadith Number 2868.
Chapter : Gravity of consuming the property of an orphan by the executer.
Narated By Abu Hurairah : The Apostle of Allah (PBUH) said: Refrain from seven (characteristics) which cause destruction. He was asked: What are they, Apostle of Allah? He replied: To assign partner to Allah, magic, to kill a soul (man) which is prohibited by Allah except for which is due, to take usury, to consume the property of an orphan, to retreat on the day of the battle, and to slander chaste women, indiscreet but beleiving.
Abu Dawud said: The name of Abu al-Ghaith is Salim client of Ibn Muti’.