Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
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
tabarani:9637 – Isḥāq b. Ibrāhīm > ʿAbd al-Razzāq > al-Thawrī > Layth > And Barah > a man Minhum > Ālá from Āmraʾatih ʿAsharah Ayyām Fasaʾal > Hā Ibn Masʿūd

[Machine] "If four months have passed, then it is a divorce."  

الطبراني:٩٦٣٧ – حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ عَنْ عَبْدِ الرَّزَّاقِ عَنِ الثَّوْرِيِّ عَنْ لَيْثٍ عَنْ وَبَرَةَ عَنْ رَجُلٍ مِنْهُمْ قَالَ آلَى مِنِ امْرَأَتِهِ عَشَرَةَ أَيَّامٍ فَسَأَلَ عَنْهَا ابْنَ مَسْعُودٍ قَالَ

«إِنْ مَضَتْ أَرْبَعَةُ أَشْهُرٍ فَهُوَ إِيلَاءٌ»  

See similar narrations below:

Collected by Ṭabarānī
tabarani:9638 – Isḥāq b. Ibrāhīm > ʿAbd al-Razzāq > Ibn ʿUyaynah > Ayyūb > Abū Qilābah

[Machine] And he said, "If four months have passed, then acknowledge the divorce."  

الطبراني:٩٦٣٨ – حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ عَنْ عَبْدِ الرَّزَّاقِ عَنِ ابْنِ عُيَيْنَةَ عَنْ أَيُّوبَ عَنْ أَبِي قِلَابَةَ قَالَ آلَى النُّعْمَانُ مِنِ امْرَأَتِهِ وَكَانَ جَالِسًا عِنْدَ ابْنِ مَسْعُودٍ فَضَرَبَ فَخِذَهُ

وَقَالَ «إِذَا مَضَتْ أَرْبَعَةُ أَشْهُرٍ فَاعْتَرِفْ بِتَطْلِيقَةٍ»