Good Manners and Form (Al-Adab)
Ṣaḥīḥ al-Bukhārī 6101
مَا بَالُ أَقْوَامٍ يَتَنَزَّهُونَ عَنِ الشَّىْءِ أَصْنَعُهُ، فَوَاللَّهِ إِنِّي لأَعْلَمُهُمْ بِاللَّهِ وَأَشَدُّهُمْ لَهُ خَشْيَةً
mā bālu aqwāmin yatanazzahūna ʿani ash-shayʾi aṣnaʿuhu, fa-wallāh innī lʾaʿlamuhum billāh wa-ashadduhum lah khashyatan
Transliteration generated from the Arabic vowel marks
The full narration
Narrated `Aisha:The Prophet (ﷺ) did something and allowed his people to do it, but some people refrained from doing it. When the Prophet (ﷺ) learned of that, he delivered a sermon, and after having sent Praises to Allah, he said, "What is wrong with such people as refrain from doing a thing that I do? By Allah, I know Allah better than they, and I am more afraid of Him than they
Source
Ṣaḥīḥ al-Bukhārī · 6101
Ṣaḥīḥ