مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 3146
Marriage
Making a Marriage publicly known, asking Woman in Marriage, and the Condition laid down - Section 1
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." (Bukhari and Muslim.)
Mishkat al-Masabih, 3146مُتَّفَقٌ عَلَيْهِ (الألباني)