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  

We were sitting with ʿImran b. Hussain and Bushair b. Kaʿb was also there. ʿImran b. Hussain reported the Messenger of Allah ﷺ as saying: Modesty is good altogether, or he said: Modesty is altogether good. Bushair b. Kaʿb said : We find in some books that there is a modesty which produces peace and dignified bearing, and there is a modesty which produces weakness. ʿImran b. Hussain repeated the same words. So ʿImran became angry so much so that his eyes became red, and he said : Don’t you see that I am transmitting a tradition from the Messenger of Allah ﷺ and you are mentioning something from your books? He (Qatadah) said : We said : Abu Nujaid, it is sufficient.  

قَالَ رَسُولُ اللَّهِ ﷺ الْحَيَاءُ خَيْرٌ كُلُّهُ أَوْ قَالَ الْحَيَاءُ كُلُّهُ خَيْرٌ فَقَالَ بُشَيْرُ بْنُ كَعْبٍ إِنَّا نَجِدُ فِي بَعْضِ الْكُتُبِ أَنَّ مِنْهُ سَكِينَةً وَوَقَارًا وَمِنْهُ ضَعْفًا فَأَعَادَ عِمْرَانُ الْحَدِيثَ وَأَعَادَ بُشَيْرٌ الْكَلاَمَ قَالَ فَغَضِبَ عِمْرَانُ حَتَّى احْمَرَّتْ عَيْنَاهُ وَقَالَ أَلاَ أَرَانِي أُحَدِّثُكَ عَنْ رَسُولِ اللَّهِ ﷺ وَتُحَدِّثُنِي عَنْ كُتُبِكَ قَالَ قُلْنَا يَا أَبَا نُجَيْدٍ إِيهٍ إِيهٍ  

One of the things people have learnt from the words of the earliest prophecy is : If you have no shame, do what you like.  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّ مِمَّا أَدْرَكَ النَّاسُ مِنْ كَلاَمِ النُّبُوَّةِ الأُولَى إِذَا لَمْ تَسْتَحِ فَافْعَلْ مَا شِئْتَ