Muwatta Imam Malik Book of Divorce, Hadith 11

Yahya related to me from Malik from Nafi that Abdullah ibn Umar said, "When a man gives a woman command over herself, then the result is as she decides unless he denies it and says that he only meant to give her one divorce and he swears to it - then he has access to her while she is in her idda."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَقُولُ إِذَا مَلَّكَ الرَّجُلُ امْرَأَتَهُ أَمْرَهَا فَالْقَضَاءُ مَا قَضَتْ بِهِ إِلاَّ أَنْ يُنْكِرَ عَلَيْهَا وَيَقُولَ لَمْ أُرِدْ إِلاَّ وَاحِدَةً فَيَحْلِفُ عَلَى ذَلِكَ وَيَكُونُ أَمْلَكَ بِهَا مَا كَانَتْ فِي عِدَّتِهَا .