It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Holy Prophet (peace and blessings be upon him) said: There are three signs of a hypocrite, even if he performs prayer and fasting and considers himself a Muslim: when he speaks, he lies; when he makes a promise, he breaks it; and when something is entrusted to him, he betrays the trust.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 10925
Hadith Gradingحکم دارالسلام:حديث صحيح، خ: 33، م: 59، وله هنا إسنادان: الأول: صحيح،والثاني:مرسل