Sahih Bukhari 6960

حَدَّثَنَا مُسَدَّدٌ ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ ، عَنْ عُبَيْدِ اللَّهِ ، قَالَ : حَدَّثَنِي نَافِعٌ ، عَنْ عَبْدِ اللَّهِ رَضِيَ اللَّهُ عَنْهُ أَنّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى عَنِ الشِّغَارِ ، قُلْتُ لِنَافِعٍ : مَا الشِّغَارُ ؟ ، قَالَ : يَنْكِحُ ابْنَةَ الرَّجُلِ وَيُنْكِحُهُ ابْنَتَهُ بِغَيْرِ صَدَاقٍ ، وَيَنْكِحُ أُخْتَ الرَّجُلِ وَيُنْكِحُهُ أُخْتَهُ بِغَيْرِ صَدَاقٍ ، وَقَالَ بَعْضُ النَّاسِ : إِنِ احْتَالَ حَتَّى تَزَوَّجَ عَلَى الشِّغَارِ فَهُوَ جَائِزٌ ، وَالشَّرْطُ بَاطِلٌ ، وَقَالَ فِي الْمُتْعَةِ : النِّكَاحُ فَاسِدٌ وَالشَّرْطُ بَاطِلٌ ، وَقَالَ بَعْضُهُمْ : الْمُتْعَةُ وَالشِّغَارُ جَائِزٌ ، وَالشَّرْطُ بَاطِلٌ .

Narrated 'Abdullah: Nafi narrated to me that 'Abdullah said that Allah's Apostle forbade the Shighar. I asked Nafi', What is the Shighar? 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 Shighar, the marriage is valid but its condition is illegal. The same scholar said regarding Al-Mut'a, The marriage is invalid and its condition is illegal. Some others said, The Mut'a and the Shighar are permissible but the condition is illegal.