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.
Sahih al-Bukhari Book 67, Hadith 49
← Previous Hadith 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."

Sahih al-Bukhari Book 67, Hadith 48 Next Hadith → 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 (ﷺ)! I do not see, but, that your Lord hurries in pleasing you.' "

Sahih al-Bukhari Book 67, Hadith 50