Riyad as-Salihin 199
Abu Hurairah (May Allah bepleased with him) reported:
Messenger of Allah (ﷺ) said, "There are three signs of a hypocrite: When he speaks, he lies; when he makes a promise, he breaks it; and when he is trusted, he betrays his trust." [Al-Bukhari and Muslim] . Another narration adds the words: 'Even if he observes fasts, performs Salat and asserts that he is a Muslim".
عن أبي هريرة ، رضي الله عنه ، أن رسول الله صلى الله عليه وسلم قال‏:‏ “آية المنافق ثلاث‏:‏ إذا حدث كذب، وإذا وعد أخلف، وإذا أؤتمن خان‏"‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏ ‏.‏