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قَوْلُهُ تَعَالَى: {قَدْ تَبَيَّنَ الرُّشْدُ مِنَ الْغَيِّ} [البقرة: 256]

nasai-kubra:10983 – Muḥammad b. Bashhār Fī Ḥadīthih > Ibn Abū ʿAdī > Shuʿbah > Abū Bishr > Saʿīd b. Jubayr > Ibn ʿAbbās

When the children of a woman (in pre-Islamic days) did not survive, she took a vow on herself that if her child survives, she would convert it a Jew. When Banu an-Nadir were expelled (from Arabia), there were some children of the Ansar (Helpers) among them. They said: We shall not leave our children. So Allah the Exalted revealed; "Let there be no compulsion in religion. Truth stands out clear from error." Abu Dawud said: Muqlat means a woman whose children do not survive. (Using translation from Abū Dāʾūd 2682)  

الكبرى للنسائي:١٠٩٨٣ – أَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ فِي حَدِيثِهِ عَنِ ابْنِ أَبِي عَدِيٍّ عَنْ شُعْبَةَ عَنْ أَبِي بِشْرٍ عَنْ سَعِيدِ بْنِ جُبَيْرٍ عَنِ ابْنِ عَبَّاسٍ قَالَ

كَانَتِ الْمَرْأَةُ تَجْعَلُ عَلَى نَفْسِهَا إِنْ عَاشَ لَهَا وَلَدٌ أَنْ تُهَوِّدَهُ فَلَمَّا أُجْلِيَتْ بَنُو النَّضِيرِ كَانَ فِيهِمْ مِنْ أَبْنَاءِ الْأَنْصَارِ قَالُوا لَا نَدَعُ أَبْنَاءَنَا فَأَنْزَلَ اللهُ ﷻ {لَا إِكْرَاهَ فِي الدِّينِ قَدْ تَبَيَّنَ الرُّشْدُ مِنَ الْغَيِّ} [البقرة 256]  

See similar narrations below:

Collected by Abū Dāwūd
abudawud:2682 – [Chain 1] Muḥammad b. ʿUmar b. ʿAlī al-Muqaddamī > Ashʿath b. ʿAbdullāh / al-Sijistānī [Chain 2] Muḥammad b. Bashhār > Ibn Abū ʿAdī And Hadhā Lafẓuh [Chain 3] al-Ḥasan b. ʿAlī > Wahbb. Jarīr > Shuʿbah > Abū Bishr > Saʿīd b. Jubayr > Ibn ʿAbbās > Kānat al-Marʾah Takūn Miqlāt Fatajʿal > Nafsihā In ʿĀsh Lahā Walad > Tuhawwidah Falammā Ujliyat

When the children of a woman (in pre-Islamic days) did not survive, she took a vow on herself that if her child survives, she would convert it a Jew. When Banu an-Nadir were expelled (from Arabia), there were some children of the Ansar (Helpers) among them. They said: We shall not leave our children. So Allah the Exalted revealed; "Let there be no compulsion in religion. Truth stands out clear from error." Abu Dawud said: Muqlat means a woman whose children do not survive.  

أبو داود:٢٦٨٢ – حَدَّثَنَا مُحَمَّدُ بْنُ عُمَرَ بْنِ عَلِيٍّ الْمُقَدَّمِيُّ قَالَ حَدَّثَنَا أَشْعَثُ بْنُ عَبْدِ اللَّهِ يَعْنِي السِّجِسْتَانِيَّ ح وَحَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ قَالَ حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ وَهَذَا لَفْظُهُ ح وَحَدَّثَنَا الْحَسَنُ بْنُ عَلِيٍّ قَالَ حَدَّثَنَا وَهْبُ بْنُ جَرِيرٍ عَنْ شُعْبَةَ عَنْ أَبِي بِشْرٍ عَنْ سَعِيدِ بْنِ جُبَيْرٍ عَنِ ابْنِ عَبَّاسٍ قَالَ

كَانَتِ الْمَرْأَةُ تَكُونُ مِقْلاَتًا فَتَجْعَلُ عَلَى نَفْسِهَا إِنْ عَاشَ لَهَا وَلَدٌ أَنْ تُهَوِّدَهُ فَلَمَّا أُجْلِيَتْ بَنُو النَّضِيرِ كَانَ فِيهِمْ مِنْ أَبْنَاءِ الأَنْصَارِ فَقَالُوا لاَ نَدَعُ أَبْنَاءَنَا فَأَنْزَلَ اللَّهُ ﷻ { لاَ إِكْرَاهَ فِي الدِّينِ قَدْ تَبَيَّنَ الرُّشْدُ مِنَ الْغَىِّ }  

قَالَ أَبُو دَاوُدَ الْمِقْلاَتُ الَّتِي لاَ يَعِيشُ لَهَا وَلَدٌ