Sahih Bukhari Volume 001, Book 002,
Hadith Number 032.
Sahih Bukhari Book 02. Belief
Narated By Abu Huraira : The Prophet
said, "The signs of a hypocrite are
three:
1. Whenever he speaks, he tells a lie.
2. Whenever he promises, he always
breaks it (his promise).
3. If you trust him, he proves to be
dishonest. (If you keep something as a
trust with him, he will not return it.)"