English translation
6960. Narrated 'Abdullāh رَضِيَ اللَّهُ عَنْهُ: Nāfi' narrated to me that 'Abdullāh رَضِيَ اللَّهُ عَنْهُ said that Allāh's Messenger ﷺ forbade Ash-Shighār. I asked Nāfi', "What is Ash-Shighār?" He said, "It is to marry the daughter of a man and marry one's daughter to that man (at the same time) without Mahr (in both cases); or to marry the sister of a man and marry one's own sister to that man without Mahr." Some people said, "If one, by a trick, marries on the basis of Shighār, the marriage is valid but its condition is illegal." The same scholar said regarding Al-Mut'a(1), "The marriage is invalid and its condition is illegal." Some others said, "The Mut'a and the Shighār are permissible but the condition is illegal."