Yahya related to me from Malik that he had heard that a man cameto Abdullah ibn Umar, and said, "Abu Abd ar-Rahman! I placed thecommand of my wife in her hand, and she divorced herself, what do youthink?" Abdullah ibn Umar said, "I think that it is as she said." Theman said, "Don't do it, Abu Abd ar-Rahman!" Ibn Umar said, "You didit, it has nothing to do with me."
USC-MSA web (English) reference: Book 29, Hadith 10
Arabic reference: Book 29, Hadith 1162