وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، أَنَّهُ سَمِعَهُ يَقُولُ إِذَا خَيَّرَ الرَّجُلُ امْرَأَتَهُ فَاخْتَارَتْهُ فَلَيْسَ ذَلِكَ بِطَلاَقٍ ‏.‏ قَالَ مَالِكٌ وَذَلِكَ أَحْسَنُ مَا سَمِعْتُ ‏.‏ قَالَ مَالِكٌ فِي الْمُخَيَّرَةِ إِذَا خَيَّرَهَا زَوْجُهَا فَاخْتَارَتْ نَفْسَهَا فَقَدْ طَلُقَتْ ثَلاَثًا وَإِنْ قَالَ زَوْجُهَا لَمْ أُخَيِّرْكِ إِلاَّ وَاحِدَةً فَلَيْسَ لَهُ ذَلِكَ ‏.‏ وَذَلِكَ أَحْسَنُ مَا سَمِعْتُهُ ‏.‏ قَالَ مَالِكٌ وَإِنْ خَيَّرَهَا فَقَالَتْ قَدْ قَبِلْتُ وَاحِدَةً وَقَالَ لَمْ أُرِدْ هَذَا وَإِنَّمَا خَيَّرْتُكِ فِي الثَّلاَثِ جَمِيعًا أَنَّهَا إِنْ لَمْ تَقْبَلْ إِلاَّ وَاحِدَةً أَقَامَتْ عِنْدَهُ عَلَى نِكَاحِهَا وَلَمْ يَكُنْ ذَلِكَ فِرَاقًا إِنْ شَاءَ اللَّهُ تَعَالَى ‏.‏

Yahya related to me that Malik heard Ibn Shihab say, "When a mangives his wife the right of choice, and she chooses him, that is notdivorce." Malik added, "That is the best of what I haveheard." Malik said that if a woman who had been given theright of choice by her husband chose herself, she was divorced trebly.If her husband said, "But I only gave her the right of choice in one,"he had none of that. That was the best of what he had heard. Malik said, "If the man gives his wife the right of choice and shesays, 'I accept one', and he says, 'I did not mean that, I have giventhe right of choice in all three together,' then if she only acceptsone, she remains with him in her marriage, and that is not separationif Allah, the Exalted wills." Translation Not Available

Book Ref: Muwatta Imam Malik Book 29 Hadith 1186
Web Ref:  Muwatta Imam Malik Book 29 Hadith 30