Is it permissible for a man to marry his wife’s breastfeeding mother?
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Question : Is it permissible for a man to marry his wife’s breastfeeding mother?
Answer : There is scholarly disagreement on this. As long as the wife is with him, it is not permissible because it would be marrying a mother and her daughter together. However, if he divorces her, the majority of scholars hold that it is not permissible, while Shaykh al-Islam Ibn Taymiyyah chose the position that it is permissible. That is the stronger position, the stronger position, yes, Shaykh al-Islam.
Answer : There is scholarly disagreement on this. As long as the wife is with him, it is not permissible because it would be marrying a mother and her daughter together. However, if he divorces her, the majority of scholars hold that it is not permissible, while Shaykh al-Islam Ibn Taymiyyah chose the position that it is permissible. That is the stronger position, the stronger position, yes, Shaykh al-Islam.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 55 - هل يجوز للرجل أن يتزوج أم زوجته من الرضاعة؟ مناسك الحج والعمرة - ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.