Narrated Ibn `Umar: Allah's Apostle 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.
Hadith Referenceصحيح البخاري / كتاب النكاح / 5112
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة