The Prophet ﷺ passed by a man of the Ansar when he was giving his brother a warning against modesty. The Apostle of Allah ﷺ said : Leave him alone, for modesty is a part of faith.
أَنَّ النَّبِيَّ ﷺ مَرَّ عَلَى رَجُلٍ مِنَ الأَنْصَارِ وَهُوَ يَعِظُ أَخَاهُ فِي الْحَيَاءِ فَقَالَ رَسُولُ اللَّهِ ﷺ دَعْهُ فَإِنَّ الْحَيَاءَ مِنَ الإِيمَانِ