The Prophet ﷺ said:
الْإِيمَانُ بِضْعٌ وَسَبْعُونَ شُعْبَةً وَالْحَيَاءُ شُعْبَةٌ مِنَ الْإِيمَانِ (Sahih Muslim: 35a)
Meaning: Faith has seventy-some parts, and ḥayāʾ (modesty)1 is a part of faith.
Abu Ṣāliḥ alone transmitted this Hadith from the Companion Abu Hurayrah. Abu Ṣāliḥ is a Successor, so here there is one narrator in the Successors' generation.
1. Ḥayāʾ (حیا): a sense of modesty that encourages good and restrains a person from wrongdoing.