Establish family ties, Be sure about one's relatives

This hadith explains that foster suckling relationships are established when a child is solely fed with milk. The Prophet Muhammad ﷺ was visiting 'Aisha and saw a man sitting with her, which made him feel uncomfortable. She then explained that he was her foster brother, to which the Prophet ﷺ replied by explaining how foster suckling relationships are formed. He said that it can only be established if the child has been solely fed with milk from its mother or wet nurse. This hadith teaches us about the importance of establishing family ties and also emphasizes on being sure about who our relatives are before claiming them as such.