Sahih al Bukhari 6102
Good Manners and Form (Al-Adab)
حَدَّثَنَا عَبْدَانُ، أَخْبَرَنَا عَبْدُ اللَّهِ، أَخْبَرَنَا شُعْبَةُ، عَنْ قَتَادَةَ، سَمِعْتُ عَبْدَ اللَّهِ ـ هُوَ ابْنُ أَبِي عُتْبَةَ مَوْلَى أَنَسٍ ـ عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم أَشَدَّ حَيَاءً مِنَ الْعَذْرَاءِ فِي خِدْرِهَا، فَإِذَا رَأَى شَيْئًا يَكْرَهُهُ عَرَفْنَاهُ فِي وَجْهِهِ.
Narrated Abu Sa`id Al-Khudri:The Prophet (ﷺ) was more shy than a virgin in her separate room. And if he saw a thing which he disliked, we would recognize that (feeling) in his face
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.