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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
malik:29-20 – Mālik > Ibn Shihāb

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."  

مالك:٢٩-٢٠ – 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  

See similar narrations below:

Collected by Bayhaqī
bayhaqi:15224 – [Chain 1] Abū Saʿīd b. Abū ʿAmr > Abū al-ʿAbbās al-Aṣam > al-Rabīʿ > al-Shāfiʿī > Mālik [Chain 2] Abū Aḥmad al-Mihrajānī > Abū Bakr b. Jaʿfar > Muḥammad b. Ibrāhīm > Ibn Bukayr > Mālik > Ibn Shihāb

[Machine] "When the four months have passed, it is considered a final divorce, and her husband can no longer take her back as long as she is in the waiting period. Malik, may Allah have mercy on him, said that the opinion of Ibn Shihab regarding this matter is more correct than the first narration."  

البيهقي:١٥٢٢٤ – أَخْبَرَنَا أَبُو سَعِيدِ بْنُ أَبِي عَمْرٍو أنا أَبُو الْعَبَّاسِ الْأَصَمُّ أنا الرَّبِيعُ أنا الشَّافِعِيُّ أنا مَالِكٌ ح وَأَخْبَرَنَا أَبُو أَحْمَدَ الْمِهْرَجَانِيُّ أنا أَبُو بَكْرِ بْنُ جَعْفَرٍ نا مُحَمَّدُ بْنُ إِبْرَاهِيمَ نا ابْنُ بُكَيْرٍ عَنْ مَالِكٍ عَنِ ابْنِ شِهَابٍ عَنْ سَعِيدِ بْنِ الْمُسَيِّبِ وَأَبِي بَكْرِ بْنِ عَبْدِ الرَّحْمَنِ كَانَا يَقُولَانِ فِي الرَّجُلِ يُؤْلِي مِنِ امْرَأَتِهِ

أَنَّهَا إِذَا مَضَتِ الْأَرْبَعَةُ الْأَشْهُرُ فَهِيَ تَطْلِيقَةٌ وَلِزَوْجِهَا عَلَيْهَا رَجْعَةٌ مَا كَانَتْ فِي الْعِدَّةِ قَالَ مَالِكٌ رَحِمَهُ اللهُ وَعَلَى ذَلِكَ كَانَ رَأْيُ ابْنِ شِهَابٍ هَذَا أَصَحُّ مِنَ الرِّوَايَةِ الْأُولَى