Is it permissible to marry the sister of a man who was breastfed by one’s mother?

The questioner : Do you have a voice now? I am traveling, walking right now? Yes, that is correct. Yes, then he asked me a simple question. The question is about breastfeeding. One person was breastfed with my younger brother, and my younger brother was breastfed with him,

The Shaykh : Yes, by her mother, I mean.

The questioner : I am the older one. Do I have the right to marry the sister of that one who is older than him? Me? So this is what he is asking,

The Shaykh : He says that I have a brother. Of course, his question includes a parenthetical remark, but he says that he is traveling. He says that my brother was breastfed by a woman, and the son of that woman was breastfed by my mother. So, is it permissible for me to take the sister of the boy who was breastfed by my mother?

The questioner : The opposite of that.

The Shaykh : Yes, or the opposite of that. We say there is no harm. It is permissible for you to take the sister of your brother through breastfeeding, do you understand? Because there is no kinship between you and her. Here is a rule that students of knowledge should know: breastfeeding does not extend to the relatives of the breastfed person. It is limited to him and his descendants. For example, the father, brother, and uncles of the breastfed child have no share in the breastfeeding. Breastfeeding only extends to the breastfed person himself and his descendants. As for his brothers, father, and mother, the effect of breastfeeding does not extend to them. May Allah reward you with good, O 'Umar. Thank you.