Hadith #61 (Sahih Muslim)
Book: The Book of Faith
Narrator(s): Hisham bin 'Abdul Malik al-Tayalasi هشام بن عبد الملك أبو الوليد الطيالسي
Grade: Sahih

Modesty is part of Iman (faith).

Source: https://parallelquran.com/hadith/sahih-muslim-61/

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Hadith #62 (Sahih Muslim)
Book: The Book of Faith
Narrator(s): Hisham bin 'Abdul Malik al-Tayalasi هشام بن عبد الملك أبو الوليد الطيالسي
Grade: Sahih

He (the Holy Prophet) happened to pass by a mass of Ansar who was instructing his brother (about modesty).

Source: https://parallelquran.com/hadith/sahih-muslim-62/