Yahya related to me from Malik from Nafi that Abdullah ibn Umarsaid, "When a man gives a woman command over herself, then the resultis as she decides unless he denies it and says that he only meant togive her one divorce and he swears to it - then he has access to herwhile she is in her idda."
USC-MSA web (English) reference: Book 29, Hadith 11
Arabic reference: Book 29, Hadith 1163