Muwatta Malik, Book 29, Hadith 18 (USC-MSA) ⓘ

Yahya related to me from Malik from Nafi that Abdullah ibn Umar said, "When a man makes a vow to abstain from intercourse with his wife and four months have passed he must declare his intent and either he is divorced or he revokes his vow. Divorce does not occur until four months have passed and he continues to abstain."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّهُ كَانَ يَقُولُ أَيُّمَا رَجُلٍ آلَى مِنِ امْرَأَتِهِ فَإِنَّهُ إِذَا مَضَتِ الأَرْبَعَةُ الأَشْهُرِ وُقِفَ حَتَّى يُطَلِّقَ أَوْ يَفِيءَ وَلاَ يَقَعُ عَلَيْهِ طَلاَقٌ إِذَا مَضَتِ الأَرْبَعَةُ الأَشْهُرِ حَتَّى يُوقَفَ ‏.‏

Yahya related to me from Malik from Ibn Shihab that Said al-Musayyab and Abu Bakr ibn Abd ar-Rahman said about a man who made a vow to abstain from intercourse with his wife, "If four months pass it is a divorce. The husband can go back to his wife as long as she is in her idda."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، أَنَّ سَعِيدَ بْنَ الْمُسَيَّبِ، وَأَبَا، بَكْرِ بْنَ عَبْدِ الرَّحْمَنِ كَانَا يَقُولاَنِ فِي الرَّجُلِ يُولِي مِنِ امْرَأَتِهِ إِنَّهَا إِذَا مَضَتِ الأَرْبَعَةُ الأَشْهُرِ فَهِيَ تَطْلِيقَةٌ وَلِزَوْجِهَا عَلَيْهَا الرَّجْعَةُ مَا كَانَتْ فِي الْعِدَّةِ ‏.‏