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nasai:3340 – Qutaybah > Muḥammad b. Mūsá > ʿAbdullāh b. ʿAbdullāh b. Abū Ṭalḥah > Anas

"Abu Talhah married Umm Sulaim and the dowry between them was Islam. Umm Sulaim became Muslim before Abu Talhah, and he proposed to her but she said: 'I have become Muslim; if you become Muslim I will marry you.' So he became Muslim, and that was the dowry between them."  

النسائي:٣٣٤٠ – أَخْبَرَنَا قُتَيْبَةُ قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ مُوسَى عَنْ عَبْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ بْنِ أَبِي طَلْحَةَ عَنْ أَنَسٍ قَالَ

تَزَوَّجَ أَبُو طَلْحَةَ أُمَّ سُلَيْمٍ فَكَانَ صَدَاقُ مَا بَيْنَهُمَا الإِسْلاَمَ أَسْلَمَتْ أُمُّ سُلَيْمٍ قَبْلَ أَبِي طَلْحَةَ فَخَطَبَهَا فَقَالَتْ إِنِّي قَدْ أَسْلَمْتُ فَإِنْ أَسْلَمْتَ نَكَحْتُكَ فَأَسْلَمَ فَكَانَ صَدَاقَ مَا بَيْنَهُمَا  

See similar narrations below:

Collected by Ṭabarānī
tabarani:21835 – Mūsá b. Hārūn > Qutaybah b. Saʿīd > Muḥammad b. Mūsá al-Makhzūmī al-Fiṭrī > ʿAbdullāh b. ʿAbdullāh b. Abū Ṭalḥah > Anas b. Mālik

"Abu Talhah married Umm Sulaim and the dowry between them was Islam. Umm Sulaim became Muslim before Abu Talhah, and he proposed to her but she said: 'I have become Muslim; if you become Muslim I will marry you.' So he became Muslim, and that was the dowry between them." (Using translation from Nasāʾī 3340)  

الطبراني:٢١٨٣٥ – حَدَّثَنَا مُوسَى بْنُ هَارُونَ ثنا قُتَيْبَةُ بْنُ سَعِيدٍ ثنا مُحَمَّدُ بْنُ مُوسَى الْمَخْزُومِيُّ الْفِطْرِيُّ عَنْ عَبْدِ اللهِ بْنِ عَبْدِ اللهِ بْنِ أَبِي طَلْحَةَ عَنْ أَنَسِ بْنِ مَالِكٍ قَالَ

تَزَوَّجَ أَبُو طَلْحَةَ أُمَّ سُلَيْمٍ وَكَانَ صَدَاقُ مَا بَيْنَهُمَا الْإِسْلَامُ أَسْلَمَتْ أُمُّ سُلَيْمٍ قَبْلَ أَبِي طَلْحَةَ فَخَطَبَهَا فَقَالَتْ «إِنِّي قَدْ أَسْلَمْتُ فِإِنْ أَسْلَمْتَ نَكَحْتُكَ» فَأَسْلَمَ فَكَانَ صَدَاقُ مَا بَيْنَهُمَا الْإِسْلَامُ  

tabarani:4677 – Jaʿfar b. Muḥammad al-Firyābī > Qutaybah b. Saʿīd > Muḥammad b. Mūsá al-Fiṭrī > ʿAbdullāh b. Abū Ṭalḥah

"Abu Talhah married Umm Sulaim and the dowry between them was Islam. Umm Sulaim became Muslim before Abu Talhah, and he proposed to her but she said: 'I have become Muslim; if you become Muslim I will marry you.' So he became Muslim, and that was the dowry between them." (Using translation from Nasāʾī 3340)  

الطبراني:٤٦٧٧ – حَدَّثَنَا جَعْفَرُ بْنُ مُحَمَّدٍ الْفِرْيَابِيُّ ثنا قُتَيْبَةُ بْنُ سَعِيدٍ ثنا مُحَمَّدُ بْنُ مُوسَى الْفِطْرِيُّ عَنْ عَبْدِ اللهِ بْنِ أَبِي طَلْحَةَ قَالَ

تَزَوَّجَ أَبُو طَلْحَةَ أُمَّ سُلَيْمٍ وَكَانَ صَدَاقُ مَا بَيْنَهُمَا الْإِسْلَامُ أَسْلَمَتْ أُمُّ سُلَيْمٍ قَبْلَ أَبِي طَلْحَةَ فَخَطَبَهَا فَقَالَتْ إِنِّي قَدْ أَسْلَمْتُ فَإِنْ أَسْلَمْتَ نَكَحْتُكَ فَأَسْلَمَ وَكَانَ صَدَاقُ مَا بَيْنَهُمَا الْإِسْلَامُ