Hadith: The Prophet (may Allah's peace and blessings be upon him) was more bashful than a virgin in her boudoir. Whenever he saw something he disliked, we could perceive that on his face

عَنْ أَبِي سَعِيدٍ الخُدْرِيِّ رضي الله عنه قَالَ:
كَانَ النَّبِيُّ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ أَشَدَّ حَيَاءً مِنَ العَذْرَاءِ فِي خِدْرِهَا، فَإِذَا رَأَى شَيْئًا يَكْرَهُهُ عَرَفْنَاهُ فِي وَجْهِهِ.
[صحيح] - [متفق عليه] - [صحيح البخاري: 6102]

Abu Sa‘īd al-Khudri (may Allah be pleased with him) reported:
The Prophet (may Allah's peace and blessings be upon him) was more bashful than a virgin in her boudoir. Whenever he saw something he disliked, we could perceive that on his face.
[Authentic hadith] - [Narrated by Bukhari & Muslim] - [Sahih Bukhari - 6102]

Explanation

Abu Sa‘īd al-Khudri (may Allah be pleased with him) informs that the Prophet (may Allah's peace and blessings be upon him) was more shy than a virgin girl who has not married and deals with men while she is veiled in her house. His shyness was so intense that if he disliked something, his face would change and he would not speak. Rather, his Companions would recognize his dislike of it through his face.