Sahih Muslim
The Book of Virtue, Good Manners and Joining of the Ties of Relationship (Kitab Al-Birr was-Salat-I-wal-Adab)
Book Number: 032 / Hadith Number: 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.