Chapter: Regarding those whom it is forbidden to marry, combining [two women] in marriage, and other matters.
Prohibition regarding marriage is of two types: prohibition due to the essence [of the person] and prohibition due to combination [with another]. It is further divided into two categories: prohibition by blood relationship and prohibition by reason [of legal cause]. The foundation for this is the Book, the Sunnah, and Consensus (Ijma'). As for the Book, it is the saying of Allah the Exalted: "Forbidden to you are your mothers." (And the verse before it and the verse after it). As for the Sunnah, Abu Hurayra reported from the Messenger of Allah - peace and blessings of Allah be upon him - that he said: "A man shall not combine a woman and her paternal aunt, nor [a woman] and her maternal aunt." Agreed upon. From 'A'isha, may Allah be pleased with her, she said: The Messenger of Allah - peace and blessings of Allah be upon him - said: "Breastfeeding prohibits what lineage prohibits." Reported by Muslim. The Ummah has reached consensus on the prohibition of that which Allah the Exalted has explicitly forbidden.
1144 - Issue: He said: (And those prohibited to marry by blood relations are: mothers, daughters, sisters, paternal aunts, maternal aunts, nieces by brother, and nieces by sister).
(1) Verses 22-24 of Surat al-Nisa'. (2) Reported by al-Bukhari, in: The Chapter on Not Marrying a Woman Over Her Paternal Aunt, from the Book of Marriage. Sahih al-Bukhari 7/15. And Muslim, in: The Chapter on the Prohibition of Combining a Woman and Her Paternal Aunt..., from the Book of Marriage. Sahih Muslim 2/1028-1030. It was also reported by Abu Dawud, in: The Chapter on What Is Disliked to Be Combined Among Women, from the Book of Marriage. Sunan Abi Dawud 1/476, 477. And Ibn Majah, in: The Chapter on Not Marrying a Woman Over Her Paternal Aunt or Her Maternal Aunt, from the Book of Marriage. Sunan Ibn Majah 1/621. And al-Darimi, in: The Chapter on the Condition in Which It Is Permissible for a Man to Propose, from the Book of Marriage. Sunan al-Darimi 2/136. And Imam Malik, in: The Chapter on What May Not Be Combined Among Women, from the Book of Marriage. al-Muwatta 2/532. (3) In: The Chapter on Breastfeeding Prohibiting What Lineage Prohibits, from the Book of Suckling. Sahih Muslim 2/1068. It was also reported by al-Bukhari, in: The Chapter on Testimony Regarding Lineage..., from the Book of Testimony; and in: The Chapter on What Was Said Regarding the Houses of the Wives of the Prophet - peace and blessings of Allah be upon him -, from the Book of the Khums; and in: The Chapter: "And your mothers who suckled you"..., from the Book of Marriage. Sahih al-Bukhari 3/222, 4/100, 7/11, 12. And Imam Malik, in: The Chapter on the Suckling of a Young Child, from the Book of Suckling. al-Muwatta 2/601.
