Yahya related to me from Malik from Ibn Shihab that Marwan ibnal-Hakam decided that if someone made three pronouncements of divorce,he had divorced his wife irrevocably.Malik said, "That iswhat I like best of what I have heard on the subject."29.2Divorce by Euphemistic Statements
USC-MSA web (English) reference: Book 29, Hadith 4
Arabic reference: Book 29, Hadith 1156