Hadithcore
Sahih al-Bukhari, 5278
sahih

Narrated Al-Miswar bin Makhrama Az-Zuhri:

I heard the Prophet (ﷺ) saying, "Banu Al-Mughira have asked my leave to let `Ali marry their daughter, but I give no leave to this effect."

حَدَّثَنَا أَبُو الْوَلِيدِ، حَدَّثَنَا اللَّيْثُ، عَنِ ابْنِ أَبِي مُلَيْكَةَ، عَنِ الْمِسْوَرِ بْنِ مَخْرَمَةَ، قَالَ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ ‏

‏ إِنَّ بَنِي الْمُغِيرَةِ اسْتَأْذَنُوا فِي أَنْ يَنْكِحَ عَلِيٌّ ابْنَتَهُمْ، فَلاَ آذَنُ ‏

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References2 variants
In-Book Reference
Book 68, Hadith 27
USC-MSA web (English) reference
Vol. 7, Book 63, Hadith 201 (deprecated numbering scheme)