Sahih Bukhari Volume 1, Book 2, Hadith Number 23

Narated By ‘Abdullah (bin ‘Umar) : Once Allah’s Apostle passed by an Ansari (man) who was admonishing to his brother regarding Haya’. On that Allah’s Apostle said, “Leave him as Haya’ is a part of faith.” (See Hadith No. 8)

References

Reference: Sahih al-Bukhari 24
In-Book Reference: Sahih al-Bukhari Book 2 Hadith 17