Once the Prophet (sal Allahu alaihi wa sallam) passed by a man who was admonishing his brother regarding Haya and was saying, 'You are very shy, and I am afraid that might harm you.' On that, Allah's Apostle said, 'Leave him, for Haya is (a part) of Faith.' [Bukhari]

Soource - Facebook post by Hadith Of the Day page.

http://www.facebook.com/#/HadithoftheDay?ref=nf