Sahih Bukhari Volume 001, Book 002,
Hadith Number 023.
Sahih Bukhari Book 02. Belief
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)