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 (TR)
USC-MSA web (English) reference: Book 29, Hadith 4 (TR)
Arabic reference (TR): Book 29, Hadith 1156 (TR)