(15) باب فِي الشِّغَارِ
Ibn 'Umar said "The Apostle of Allaah(ﷺ) prohibited shighar marriage. Musaddad added in his version "I said to 'Nafi "What is shighar?" (It means that) a man marries the daughter of another man and gives his own daughter to him in marriage without fixing dower; and a man marries the sister of another man and gives him his sister in marriage without fixing dower.
Reference: Sunan Abi Dawud 2074
In-book reference: Book 12, Hadith 29
English translation: Book 11, Hadith 2069