"Abu Talhah proposed marriage to Umm Sulaim and she said: 'By Allah, a man like you is not to be rejected, O Abu Talhah, but you are a disbeliever and I am a Muslim, and it is not permissible for me to marry you. If you become Muslim, that will be my dowry, and I will not ask you for anything else.' So he became Muslim and that was her dowry." (one of the narrators) Thabit said: "I have never heard of a woman whose dowry was more precious than Umm Sulaim (whose dowry was) Islam. And he consummated the marriage with her, and she bore him a child."  

وَاللَّهِ مَا مِثْلُكَ يَا أَبَا طَلْحَةَ يُرَدُّ وَلَكِنَّكَ رَجُلٌ كَافِرٌ وَأَنَا امْرَأَةٌ مُسْلِمَةٌ وَلاَ يَحِلُّ لِي أَنْ أَتَزَوَّجَكَ فَإِنْ تُسْلِمْ فَذَاكَ مَهْرِي وَمَا أَسْأَلُكَ غَيْرَهُ فَأَسْلَمَ فَكَانَ ذَلِكَ مَهْرَهَا قَالَ ثَابِتٌ فَمَا سَمِعْتُ بِامْرَأَةٍ قَطُّ كَانَتْ أَكْرَمَ مَهْرًا مِنْ أُمِّ سُلَيْمٍ الإِسْلاَمَ فَدَخَلَ بِهَا فَوَلَدَتْ لَهُ  

[Machine] Abu Talha proposed to Umm Sulaim before he converted, and she said, "Indeed, I desire you, and there is no one like you that I would choose. However, you are an unbeliever and I am a Muslim woman. If you convert, that will be my dowry and I will not ask you for anything else." So Abu Talha converted and married her.  

خَطَبَ أَبُو طَلْحَةَ أُمَّ سُلَيْمٍ قَبْلَ أَنْ يُسْلِمِ فَقَالَتْ أَمَا إِنِّي فِيكَ لَرَاغِبَةٌ وَمَا مِثْلُكَ يُرَدُّ وَلَكِنَّكَ رَجُلٌ كَافِرٌ وَأَنَا امْرَأَةٌ مَسْلَمَةٌ فَإِنْ تُسْلِمْ فَذَلِكَ مَهْرِي لَا أَسْأَلُكَ غَيْرَهُ فَأَسْلَمَ أَبُو طَلْحَةَ وَتَزَوَّجَهَا