Ibn 'Umar (May Allah be pleased with them) reported:
Messenger of Allah ﷺ passed by a man of the Ansar who was admonishing his brother regarding shyness. Messenger of Allah ﷺ said, "Leave him alone, for modesty is a part of Iman."

[Al-Bukhari and Muslim].

وعن ابن عمر رضي الله عنهما أن رسول الله ﷺ مر على رجل من الأنصار وهو يعظ أخاه في الحياء، فقال رسول الله ﷺ:"دعه فإن الحياء من الإيمان" ((متفق عليه)) .