Hadith 5070
وَعَنِ ابْنِ عُمَرَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَرَّ عَلَى رَجُلٍ مِنَ الْأَنْصَارِ وَهُوَ يَعِظُ أَخَاهُ فِي الْحَيَاءِ فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «دَعْهُ فَإِنَّ الْحَيَاءَ مِنَ الْإِيمَانِ» . مُتَّفَقٌ عَلَيْهِ
It is narrated from Ibn Umar, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, passed by an Ansari man who was advising his brother regarding modesty (saying, "Do not be so shy"). The Messenger of Allah, peace and blessings be upon him, said: "Leave him, for modesty is a part of faith." Agreed upon.