Characteristics of the Hypocrite:
(1 ) Whenever he talks, he tells a lie; (2) whenever he makes a promise, he breaks it;
(3) whenever he makes a covenant he proves treacherous;
(4) and whenever he quarrels, he behaves impudently in an evil insulting manner.
-Prophet Muhammad (SAW)
Ref: Bukhari 2459 
at 11:35
