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tirmidhi:2615Ibn Abū ʿUmar And ʾAḥmad b. Manīʿ al-Maʿná Wāḥid > Sufyān b. ʿUyaynah > al-Zuhrī > Sālim from his father

that the Messenger of Allah ﷺ passed by a man and he was chastising his brother about modesty, so the Messenger of Allah ﷺ said: "Al-Haya' is part of faith."  

الترمذي:٢٦١٥حَدَّثَنَا ابْنُ أَبِي عُمَرَ وَأَحْمَدُ بْنُ مَنِيعٍ الْمَعْنَى وَاحِدٌ قَالاَ حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ عَنِ الزُّهْرِيِّ عَنْ سَالِمٍ عَنْ أَبِيهِ

أَنَّ رَسُولَ اللَّهِ ﷺ مَرَّ بِرَجُلٍ وَهُوَ يَعِظُ أَخَاهُ فِي الْحَيَاءِ فَقَالَ رَسُولُ اللَّهِ ﷺ الْحَيَاءُ مِنَ الإِيمَانِ قَالَ أَحْمَدُ بْنُ مَنِيعٍ فِي حَدِيثِهِ إِنَّ النَّبِيَّ ﷺ سَمِعَ رَجُلاً يَعِظُ أَخَاهُ فِي الْحَيَاءِ قَالَ هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ وَفِي الْبَابِ عَنْ أَبِي هُرَيْرَةَ وَأَبِي بَكْرَةَ وَأَبِي أُمَامَةَ