عن أبي هريرة عن النبي صلى الله عليه وسلم قال آية المنافق ثلاث إذا حدث كذب وإذا وعد أخلف وإذا اؤتمن خان (صحيح البخاري #33)

Hazrat Abu Hurairah (radhiyallahu ‘anhu) reports that Rasulullah (sallallahu ‘alaihi wasallam) said, “The signs of a hypocrite are three; when he speaks, he lies, when he makes a promise, he breaks it, and when he is entrusted (with a trust), he deceives (and violates the trust).”