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كتاب المناقب
61  
Virtues and Merits of the Prophet (pbuh) and his Companions
(16)
Chapter: Whoever liked that his ancestors should not be abused
(16)
باب مَنْ أَحَبَّ أَنْ لاَ يُسَبَّ نَسَبُهُ
Sahih al-Bukhari 3531

Narrated `Aisha:

Once Hassan bin Thabit asked the permission of the Prophet (ﷺ) to lampoon (i.e. compose satirical poetry defaming) the infidels. The Prophet (ﷺ) said, "What about the fact that I have common descent with them?" Hassan replied, "I shall take you out of them as a hair is taken out of dough." Narrated `Urwa: I started abusing Hassan in front of `Aisha, whereupon she said. "Don't abuse him, for he used to defend the Prophet (with his poetry).

حَدَّثَنِي عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدَةُ، عَنْ هِشَامٍ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتِ اسْتَأْذَنَ حَسَّانُ النَّبِيَّ صلى الله عليه وسلم فِي هِجَاءِ الْمُشْرِكِينَ، قَالَ ‏ "‏ كَيْفَ بِنَسَبِي ‏"‏‏.‏ فَقَالَ حَسَّانُ لأَسُلَّنَّكَ مِنْهُمْ كَمَا تُسَلُّ الشَّعَرَةُ مِنَ الْعَجِينِ‏.‏ وَعَنْ أَبِيهِ قَالَ ذَهَبْتُ أَسُبُّ حَسَّانَ عِنْدَ عَائِشَةَ فَقَالَتْ لاَ تَسُبُّهُ فَإِنَّهُ كَانَ يُنَافِحُ عَنِ النَّبِيِّ صلى الله عليه وسلم‏.‏
Reference : Sahih al-Bukhari 3531
In-book reference : Book 61, Hadith 40
USC-MSA web (English) reference : Vol. 4, Book 56, Hadith 731
  (deprecated numbering scheme)