سَأَلْتُهُ عَنِ الرَّجُلِ يَتَزَوَّجُ الْمَرْأَةَ وَ يَتَزَوَّجُ أُمَّ وَلَدِ أَبِيهَا فَقَالَ لَا بَأْسَ بِذَلِكَ فَقُلْتُ لَهُ بَلَغَنَا عَنْ أَبِيكَ أَنَّ عَلِيَّ بْنَ الْحُسَيْنِ ع تَزَوَّجَ ابْنَةَ الْحَسَنِ بْنِ عَلِيٍّ ع وَ أُمَّ وَلَدِ الْحَسَنِ وَ ذَلِكَ أَنَّ رَجُلًا مِنْ أَصْحَابِنَا سَأَلَنِي أَنْ أَسْأَلَكَ عَنْهَا فَقَالَ لَيْسَ هَكَذَا إِنَّمَا تَزَوَّجَ عَلِيُّ بْنُ الْحُسَيْنِ ع ابْنَةَ الْحَسَنِ وَ
“I once asked al-Rida’ (a.s.), about the case of a man who marries a woman then marries the mother of the child of her father. He (the Imam) said, ‘It is not unlawful.’ I then asked, ‘It is narrated to us from your father (a.s.), that Ali ibn al-Husayn (a.s.), married, daughter of al-Hassan ibn Ali (a.s.), and mother o