Sahih Bukhari Volume 3, Book 46, Hadith 2460

حَدَّثَنَا بِشْرُ بْنُ خَالِدٍ، أَخْبَرَنَا مُحَمَّدٌ، عَنْ شُعْبَةَ، عَنْ سُلَيْمَانَ، عَنْ عَبْدِ اللَّهِ بْنِ مُرَّةَ، عَنْ مَسْرُوقٍ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو ـ رضى الله عنهما ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏"‏ أَرْبَعٌ مَنْ كُنَّ فِيهِ كَانَ مُنَافِقًا، أَوْ كَانَتْ فِيهِ خَصْلَةٌ مِنْ أَرْبَعَةٍ كَانَتْ فِيهِ خَصْلَةٌ مِنَ النِّفَاقِ، حَتَّى يَدَعَهَا إِذَا حَدَّثَ كَذَبَ، وَإِذَا وَعَدَ أَخْلَفَ، وَإِذَا عَاهَدَ غَدَرَ، وَإِذَا خَاصَمَ فَجَرَ ‏"‏‏.‏

Narrated By 'Abdullah bin 'Amr : The Prophet said, "Whoever has (the following) four characters will be a hypocrite, and whoever has one of the following four characteristics will have one characteristic of hypocrisy until he gives it up. These are: (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."