(28) باب الشِّغَارِ
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.
Reference: Sahih al-Bukhari 5112
In-book reference: Book 67, Hadith 49
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 62, Hadith 47