حَدَّثَنِي يَحْيَى، عَنْ مَالِك، عَنْ
نَافِعٍ ، عَنْ
عَبْدِ اللَّهِ بْنِ عُمَرَ : أَنّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ
" نَهَى عَنِ الشِّغَارِ " . وَالشِّغَارُ : أَنْ يُزَوِّجَ الرَّجُلُ ابْنَتَهُ عَلَى أَنْ يُزَوِّجَهُ الْآخَرُ ابْنَتَهُ لَيْسَ بَيْنَهُمَا صَدَاقٌ
It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) forbade shighar. Shighar is when a man marries his daughter to another man on the condition that the other marries his daughter to him, with no dowry except this.