[Bukhari Vol. 1 : No. 33]

Narrated 'Abdullah bin 'Amr (Radi-Allahu 'anhu):

The Prophet (Sallallahu 'Alaihi Wa Sallam) said, "Whoever has the following
four (characteristics) will be a pure hypocrite and whoever has one of the
following four characteristics will have one characteristic of hypocrisy
unless and until he gives it up.

1. Whenever he is entrusted, he betrays.

2. Whenever he speaks, he tells a lie.

3. Whenever he makes a covenant, he proves treacherous.

4. Whenever he quarrels, he behaves in a very imprudent, evil and insulting
manner."