عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ ((ثَلَاثٌ مَنْ كُنَّ فِيهِ فَهُوَ مُنَافِقٌ وَإِنْ صَامَ وَصَلَّى وَزَعَمَ أَنَّهُ مُسْلِمٌ إِذَا حَدَّثَ كَذَبَ وَإِذَا وَعَدَ أَخْلَفَ وَإِذَا ائْتُمِنَ خَانَ))
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: There are three traits; whoever possesses them is a hypocrite, even if he fasts, prays, and thinks that he is a Muslim: when he speaks, he lies; when he makes a promise, he breaks it; and when he is entrusted, he betrays the trust.