In this Hadīth, Zaynab bint Abi Salamah (may Allah be pleased with her) informs that she heard her mother' Umm Salamah, the Prophet's wife, swearing to 'Ā’ishah (may Allah be pleased with her) and saying: "By Allah, I do not feel comfortable" i.e., I do not like it; "to be seen by a boy" from non-Mahram (unrelated) males "who has passed the age of suckling" i.e., he is no longer in need of suckling. Thereupon, ‘Ā’ishah said to ’Umm Salamah (may Allah be pleased with both of them): "Why?" i.e., why are you saying this, whereas there is nothing wrong with that if you suckle him or he is suckled by someone who makes him a Mahram (related and non-marriageable) to you? This is evidenced by the fact that "Sahlah bint Suhayl", the wife of Abu Hudhayfah, came to the Messenger of Allah (may Allah's peace and blessings be upon him) and swore to him that she would see dislike on the face of Abu Hudhayfah because of their foster son Sālim continuing to enter the house as he would usually do when he was young, and he now reached adulthood - particularly after verses had been revealed prohibiting adoption. Thereupon, the Messenger of Allah (may Allah's peace and blessings be upon him) said to her: "Suckle him" to be your son by suckling. She said to him: "He has a beard" for he is an adult man. The Prophet (may Allah's peace and blessings be upon him) said to her: "Suckle him and what is on the face of Abu Hudhayfah will go away" i.e., the sign of dislike will vanish from him. Sahlah did so and then she swore that she did not find the sign of dislike on the face of Abu Hudhayfah after she had suckled him. This Hadīth is problematic in terms of explaining it and deriving rulings therefrom, and difference of opinion actually arose over it among the Prophet's wives. ’Umm Salamah and some of the Prophet's wives believed that this was a dispensation from the Prophet (may Allah's peace and blessings be upon him) to the wife of Abu Hudhayfah alone, and they held that there should be no suckling for adults and that the suckling that makes a person a Mahram is the one provided in young age and which grows the bones and builds the body and flesh. As for ‘Ā’ishah (may Allah be pleased with her), she - as reported here - held that suckling causes prohibition of the same things made prohibited by blood relations, whether the suckled one is a child or an adult. She cited as evidence the story of Sālim, the freed slave of Abu Hudhayfah (may Allah be pleased with both of them) and that the ruling is not exclusively restricted to them. What appears to be right - and Allah knows best - is that suckling of adults does not count, has no effect, and causes no prohibition, and that true suckling is that which occurs during babyhood; and what happened in the story of Sālim is particularly restricted to him and does not apply to anyone other than him. The Prophet (may Allah's peace and blessings be upon him) affirmed that not every suckling causes prohibition. In a Hadīth in the Two Sahīh Collections, he said: "Indeed, suckling is from hunger" i.e., the suckling that counts is the one that occurs at the time when milk is relied upon for food and in the amounts that affect the growth of the baby's body. The Hadīth points out that suckling causes prohibition of the same things made prohibited by blood relations. It demonstrates that there is a difference of opinion regarding the suckling of adults and its resultant effects..