The Book of Virtue, Good Manners and Joining of the Ties of Relationship (Kitab Al-Birr was-Salat-I-wa'l-Adab)
Muslim :: Book 32 : Hadith 6247
Abu Dharr reported Allah's Messenger (may peace be upon him) as saying that he reported it from his Lord, the Exalted and Glorious: Verily I have made oppression unlawful for Me and for My servants too, so do not commit oppression. The rest of the hadith is the same.