Yahya related to me from Malik from Nafi from Abdullah ibn Umarthat the Messenger of Allah, may Allah bless him and grant him peace,forbade shighar, which meant one man giving his daughter in marriageto another man on the condition that the other gave his daughter tohim in marriage without either of them paying the bride-price.
USC-MSA web (English) reference: Book 28, Hadith 24
Arabic reference: Book 28, Hadith 1118