I heard the Prophet ﷺ saying, "Banu Al-Mughira have asked my leave to let ʿAli marry their daughter, but I give no leave to this effect."
سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ إِنَّ بَنِي الْمُغِيرَةِ اسْتَأْذَنُوا فِي أَنْ يَنْكِحَ عَلِيٌّ ابْنَتَهُمْ فَلاَ آذَنُ