Narrated Aisha": (regarding) the Verse: 'And if you fear that you shall not be able to deal justly with the orphans...' (4.3) It is about the orphan girl who is in the custody of a man who is her guardian, and he intends to marry her because of her wealth, but he treats her badly and does not manage her property fairly and honestly. Such a man should marry women of his liking other than her, two or three or four. 'Prohibited to you (for marriage) are: ...your foster-mothers (who suckled you).' (4.23) Marriage is prohibited between persons having a foster suckling relationship corresponding to a blood relationship which renders marriage unlawful.

Narrated `Aisha: (the wife of the Prophet) that while Allah's Messenger (ﷺ) was with her, she heard a voice of a man asking permission to enter the house of Hafsa. `Aisha added: I said, "O Allah's Messenger! This man is asking permission to enter your house." The Prophet (ﷺ) said, "I think he is so-and-so," naming the foster-uncle of Hafsa. `Aisha said, "If so-and-so," naming her foster uncle, "were living, could he enter upon me?" The Prophet (ﷺ) said, "Yes, for foster suckling relations make all those things unlawful which are unlawful through corresponding birth (blood) relations."

Narrated Ibn `Abbas: It was said to the Prophet, "Won't you marry the daughter of Hamza?" He said, "She is my foster niece (brother's daughter). "

Narrated Um Habiba: (daughter of Abu Sufyan) I said, "O Allah's Messenger! Marry my sister. the daughter of Abu Sufyan." The Prophet (ﷺ) said, "Do you like that?" I replied, "Yes, for even now I am not your only wife and I like that my sister should share the good with me." The Prophet (ﷺ) said, "But that is not lawful for me." I said, We have heard that you want to marry the daughter of Abu Salama." He said, "(You mean) the daughter of Um Salama?" I said, "Yes." He said, "Even if she were not my step-daughter, she would be unlawful for me to marry as she is my foster niece. I and Abu Salama were suckled by Thuwaiba. So you should not present to me your daughters or your sisters (in marriage)." Narrated 'Urwa: Thuwaiba was the freed slave girl of Abu Lahb whom he had manumitted, and then she suckled the Prophet. When Abu Lahb died, one of his relatives saw him in a dream in a very bad state and asked him, "What have you encountered?" Abu Lahb said, "I have not found any rest since I left you, except that I have been given water to drink in this (the space between his thumb and other fingers) and that is because of my manumitting Thuwaiba."

Narrated `Aisha: that the Prophet (ﷺ) entered upon her while a man was sitting with her. Signs of answer seemed to appear on his face as if he disliked that. She said, "Here is my (foster) brother." He said, "Be sure as to who is your foster brother, for foster suckling relationship is established only when milk is the only food of the child."

Narrated Aisha: that Aflah the brother of Abu Al-Qu'ais, her foster uncle, came, asking permission to enter upon her after the Verse of Al-Hijab (the use of veils by women) was revealed. `Aisha added: I did not allow him to enter, but when Allah's Messenger (ﷺ) came, I told him what I had done, and he ordered me to give him permission.

Narrated `Uqba bin Al-Harith: I married a woman and then a black lady came to us and said, "I have suckled you both (you and your wife)." So I came to the Prophet (ﷺ) and said, "I married so-and-so and then a black lady came to us and said to me, 'I have suckled both of you.' But I think she is a liar." The Prophet (ﷺ) turned his face away from me and I moved to face his face, and said, "She is a liar." The Prophet (ﷺ) said, "How (can you keep her as your wife) when that lady has said that she has suckled both of you? So abandon (i.e., divorce) her (your wife).

Ibn 'Abbas further said, "Seven types of marriages are unlawful because of blood relations, and seven because of marriage relations." Then Ibn 'Abbas recited the Verse: "Forbidden for you (for marriages) are your mothers..." (4:23). 'Abdullah bin Ja'far married the daughter and wife of 'Ali at the same time (they were step-daughter and mother). Ibn Sirin said, "There is no harm in that." But Al-Hasan Al-Basri disapproved of it at first, but then said that there was no harm in it. Al-Hasan bin Al-Hasan bin 'Ali married two of his cousins in one night. Ja'far bin Zaid disapproved of that because of it would bring hatred (between the two cousins), but it is not unlawful, as Allah said, "Lawful to you are all others . (4:24). Ibn 'Abbas said: "If somebody commits illegal sexual intercourse with his wife's sister, his wife does not become unlawful for him." And narrated Abu Ja'far, "If a person commits homosexuality with a boy, then the mother of that boy is unlawful for him to marry." Narrated Ibn 'Abbas, "If one commits illegal sexual intercourse with his mother in law, then his married relation to his wife does not become unlawful." Abu Nasr reported to have said that Ibn 'Abbas in the above case, regarded his marital relation to his wife unlawful, but Abu Nasr is not known well for hearing Hadith from Ibn 'Abbas. Imran bin Hussain, Jabir b. Zaid, Al-Hasan and some other Iraqi's, are reported to have judged that his marital relations to his wife would be unlawful. In the above case Abu Hurairah said, "The marital relation to one's wife does not become unlawful except if one as had sexual intercourse (with her mother)." Ibn Al-Musaiyab, 'Urwa, and Az-Zuhri allows such person to keep his wife. 'Ali said, "His marital relations to his wife does not become unlawful."

Narrated Um Habiba: I said, "O Allah's Messenger! Do you like to have (my sister) the daughter of Abu Sufyan?" The Prophet (ﷺ) said, "What shall I do (with her)?" I said, "Marry her." He said, "Do you like that?" I said, "(Yes), for even now I am not your only wife, so I like that my sister should share you with me." He said, "She is not lawful for me (to marry)." I said, "We have heard that you want to marry." He said, "The daughter of Um Salama?" I said, "Yes." He said, "Even if she were not my stepdaughter, she should be unlawful for me to marry, for Thuwaiba suckled me and her father (Abu Salama). So you should neither present your daughters, nor your sisters, to me."

Narrated Um Habiba: I said, "O Allah's Messenger! Marry my sister, the daughter of Abu Sufyan." He said, "Do you like that?" I said, "Yes, for even now I am not your only wife; and the most beloved person to share the good with me is my sister." The Prophet (ﷺ) said, "But that is not lawful for me (i.e., to be married to two sisters at a time.)" I said, "O Allah's Messenger! By Allah, we have heard that you want to marry Durra, the daughter of Abu Salama." He said, "You mean the daughter of Um Salama?" I said, "Yes." He said, "By Allah ! Even if she were not my stepdaughter, she would not be lawful for me to marry, for she is my foster niece, for Thuwaiba has suckled me and Abu Salama; so you should neither present your daughters, nor your sisters to me."

Narrated Abu Huraira: The Prophet (ﷺ) forbade that a woman should be married to a man along with her paternal aunt or with her maternal aunt (at the same time). Az-Zuhri (the sub-narrator) said: There is a similar order for the paternal aunt of the father of one's wife, for 'Urwa told me that `Aisha said, "What is unlawful because of blood relations, is also unlawful because of the corresponding foster suckling relations."

Narrated Ibn `Umar: Allah's Messenger (ﷺ) forbade Ash-Shighar, which means that somebody marries his daughter to somebody else, and the latter marries his daughter to the former without paying Mahr.

Narrated Hisham's father: Khaula bint Hakim was one of those ladies who presented themselves to the Prophet (ﷺ) for marriage. `Aisha said, "Doesn't a lady feel ashamed for presenting herself to a man?" But when the Verse: "(O Muhammad) You may postpone (the turn of) any of them (your wives) that you please,' (33.51) was revealed, " `Aisha said, 'O Allah's Messenger! I do not see, but, that your Lord hurries in pleasing you.' "

Narrated `Ali: I said to Ibn `Abbas, "During the battle of Khaibar the Prophet (ﷺ) forbade (Nikah) Al-Mut'a and the eating of donkey's meat."

Narrated Abu Jamra: I heard Ibn `Abbas (giving a verdict) when he was asked about the Mut'a with the women, and he permitted it (Nikah-al-Mut'a). On that a freed slave of his said to him, "That is only when it is very badly needed and women are scarce." On that, Ibn `Abbas said, "Yes."

Narrated Jabir bin `Abdullah and Salama bin Al-Akwa`: While we were in an army, Allah's Messenger (ﷺ) came to us and said, "You have been allowed to do the Mut'a (marriage), so do it."

Salama bin Al-Akwa` said: Allah's Messenger's said, "If a man and a woman agree (to marry temporarily), their marriage should last for three nights, and if they like to continue, they can do so; and if they want to separate, they can do so." I do not know whether that was only for us or for all the people in general. Abu `Abdullah (Al-Bukhari) said: `Ali made it clear that the Prophet said, "The Mut'a marriage has been cancelled (made unlawful).

Narrated Thabit Al-Banani: I was with Anas while his daughter was present with him. Anas said, "A woman came to Allah's Apostle and presented herself to him, saying, 'O Allah's Messenger, have you any need for me (i.e. would you like to marry me)?' "Thereupon Anas's daughter said, "What a shameless lady she was ! Shame! Shame!" Anas said, "She was better than you; she had a liking for the Prophet (ﷺ) so she presented herself for marriage to him."

Narrated Sahl bin Sa`d: A woman presented herself to the Prophet (for marriage). A man said to him, "O Allah's Messenger! (If you are not in need of her) marry her to me." The Prophet (ﷺ) said, "What have you got?" The man said, "I have nothing." The Prophet (ﷺ) said (to him), "Go and search for something) even if it were an iron ring." The man went and returned saying, "No, I have not found anything, not even an iron ring; but this is my (Izar) waist sheet, and half of it is for her." He had no Rida' (upper garment). The Prophet (ﷺ) said, "What will she do with your waist sheet? If you wear it, she will have nothing over her; and if she wears it, you will have nothing over you." So the man sat down and when he had sat a long time, he got up (to leave). When the Prophet (ﷺ) saw him (leaving), he called him back, or the man was called (for him), and he said to the man, "How much of the Qur'an do you know (by heart)?" The man replied I know such Sura and such Sura (by heart)," naming the Suras The Prophet (ﷺ) said, "I have married her to you for what you know of the Qur'an ."

Narrated `Abdullah bin `Umar: `Umar bin Al-Khattab said, "When Hafsa bint `Umar became a widow after the death of (her husband) Khunais bin Hudhafa As-Sahmi who had been one of the companions of the Prophet, and he died at Medina. I went to `Uthman bin `Affan and presented Hafsa (for marriage) to him. He said, "I will think it over.' I waited for a few days, then he met me and said, 'It seems that it is not possible for me to marry at present.' " `Umar further said, "I met Abu Bakr As-Siddique and said to him, 'If you wish, I will marry my daughter Hafsa to you." Abu Bakr kept quiet and did not say anything to me in reply. I became more angry with him than with `Uthman. I waited for a few days and then Allah's Messenger (ﷺ) asked for her hand, and I gave her in marriage to him. Afterwards I met Abu Bakr who said, 'Perhaps you became angry with me when you presented Hafsa to me and I did not give you a reply?' I said, 'Yes.' Abu Bakr said, 'Nothing stopped me to respond to your offer except that I knew that Allah's Apostle had mentioned her, and I never wanted to let out the secret of Allah's Messenger. And if Allah's Apostle had refused her, I would have accepted her.' "