وَعَنِ ابْنِ عُمَرَ
أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى عَنْ الشِّغَارِ وَالشِّغَارُ: أَنْ يُزَوِّجَ الرَّجُلُ ابْنَتَهُ عَلَى أَنْ يُزَوِّجَهُ الْآخَرُ ابْنَتَهُ وَلَيْسَ بَيْنَهُمَا صَدَاقٌ
Ibn Umar said God’s Messenger prohibited shighar, which means that a man gives his daughter in marriage on condition that the other gives his daughter to him in marriage without any dower being paid by either. In a version by Muslim he said, “There is no shighar in Islam.”
Mishkat al-Masabih 3021, Book 14, Marriage, Hadith 66. 1 min read