A young man wants to marry his maternal uncle's daughter, but her brother was breastfed by the young man's sister. Is it permissible for him to marry her, and likewise if the situation were reversed?
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The questioner : May Allah reward the honorableThe Shaykh : I am a young man who wants to marry my maternal uncle's daughter, but her brother was breastfed by my sister. Is it permissible for me to marry her? And if the situation were reversed, where my sister was breastfed by her brother, is it also permissible for me to marry her? I ask for clarification.
The Shaykh : Yes, it is permissible for you to marry her. That is, it is permissible for a man to marry a woman if her brother was breastfed by her mother, or if her sister was breastfed by his mother, as long as the woman he wants to marry was not breastfed by his mother, and he was not breastfed by her mother or by a woman whose daughter is forbidden to him. In that case, there is no harm. For this reason, we will now give a useful rule regarding breastfeeding: the breastfed child has fathers and mothers, does he not? Is there any doubt about that? The breastfed child has fathers and mothers, and he has brothers and sisters, and he has paternal uncles and aunts. None of these people are affected by breastfeeding at all. He has descendants; it is the descendants who are affected by breastfeeding. Pay attention. So, to whom does breastfeeding extend? It extends to the descendants of the breastfed person, and it does not extend to his ancestors, who are the fathers and mothers, nor to his collaterals, who are the brothers and sisters, paternal uncles and aunts, maternal uncles and aunts. Therefore, if you were breastfed by a woman who has a daughter, her daughter is forbidden to you. Why? Because she is your sister. She is permissible for your brother. She is permissible for your brother, because there is no relationship at all between her and your brother. She is not his sister through breastfeeding, nor his paternal aunt, nor his maternal aunt. Likewise, if you were breastfed by a woman, and you have a son, is it permissible for this son to marry the daughter of this woman? Pay attention, everyone. You were breastfed by a woman who has a daughter. Is it permissible for your son to marry her daughter?
The questioner : It is not permissible.
The Shaykh : Why? Because she is his paternal aunt. Because she is his paternal aunt, the sister of his father. Now, if your brother was breastfed by a woman, and your brother has sons, is it permissible for your brother's sons to marry the sister of the woman who breastfed you? Not one of her daughters, but her sister. That is, the woman who breastfed you has a sister. Is it permissible for your sons to marry this sister? O brothers! Did you understand this scenario? A woman breastfed a man who has a sister. Is it permissible for the sons of this breastfed man to marry the sister of the woman who breastfed him? Now let us see. What is the sister of the woman who breastfed you in relation to you? Is she your maternal aunt? Now, here is an important rule: "The maternal aunt of a person is the maternal aunt of his descendants". The maternal aunt of a person is the maternal aunt of his descendants. So, the sister of the woman who breastfed you is considered the maternal aunt of your sons, and it is not permissible for them to marry her. Why? Because the maternal aunt of a person is the maternal aunt for him and for his sons and daughters. The paternal aunt of a person is the paternal aunt for him and for his sons and daughters. The maternal uncle of a person is the maternal uncle for him and for his sons and daughters. The paternal uncle of a person is the paternal uncle for him and for his sons and daughters. Yes, that is correct.
The Shaykh : Yes, it is permissible for you to marry her. That is, it is permissible for a man to marry a woman if her brother was breastfed by her mother, or if her sister was breastfed by his mother, as long as the woman he wants to marry was not breastfed by his mother, and he was not breastfed by her mother or by a woman whose daughter is forbidden to him. In that case, there is no harm. For this reason, we will now give a useful rule regarding breastfeeding: the breastfed child has fathers and mothers, does he not? Is there any doubt about that? The breastfed child has fathers and mothers, and he has brothers and sisters, and he has paternal uncles and aunts. None of these people are affected by breastfeeding at all. He has descendants; it is the descendants who are affected by breastfeeding. Pay attention. So, to whom does breastfeeding extend? It extends to the descendants of the breastfed person, and it does not extend to his ancestors, who are the fathers and mothers, nor to his collaterals, who are the brothers and sisters, paternal uncles and aunts, maternal uncles and aunts. Therefore, if you were breastfed by a woman who has a daughter, her daughter is forbidden to you. Why? Because she is your sister. She is permissible for your brother. She is permissible for your brother, because there is no relationship at all between her and your brother. She is not his sister through breastfeeding, nor his paternal aunt, nor his maternal aunt. Likewise, if you were breastfed by a woman, and you have a son, is it permissible for this son to marry the daughter of this woman? Pay attention, everyone. You were breastfed by a woman who has a daughter. Is it permissible for your son to marry her daughter?
The questioner : It is not permissible.
The Shaykh : Why? Because she is his paternal aunt. Because she is his paternal aunt, the sister of his father. Now, if your brother was breastfed by a woman, and your brother has sons, is it permissible for your brother's sons to marry the sister of the woman who breastfed you? Not one of her daughters, but her sister. That is, the woman who breastfed you has a sister. Is it permissible for your sons to marry this sister? O brothers! Did you understand this scenario? A woman breastfed a man who has a sister. Is it permissible for the sons of this breastfed man to marry the sister of the woman who breastfed him? Now let us see. What is the sister of the woman who breastfed you in relation to you? Is she your maternal aunt? Now, here is an important rule: "The maternal aunt of a person is the maternal aunt of his descendants". The maternal aunt of a person is the maternal aunt of his descendants. So, the sister of the woman who breastfed you is considered the maternal aunt of your sons, and it is not permissible for them to marry her. Why? Because the maternal aunt of a person is the maternal aunt for him and for his sons and daughters. The paternal aunt of a person is the paternal aunt for him and for his sons and daughters. The maternal uncle of a person is the maternal uncle for him and for his sons and daughters. The paternal uncle of a person is the paternal uncle for him and for his sons and daughters. Yes, that is correct.