It has been reported on the authority of 'Adi b. 'Amira al-Kindi who said:
I heard the Messenger of Allah ( صلی اللہ علیہ وسلم ) say: Whosoever from you is appointed by us to a position of authority and he conceals from us a needle or something smaller than that, it would be misappropriation (of public funds) and will (have to) produce it on the Day of Judgment. The narrator says: A dark-complexioned man from the Ansar stood up - I can visualise him still - and said: Messenger of Allah, take back from me your assignment. He said: What has happened to you? The man said: I have heard you say so and so. He said: I say that (even) now: Whosoever from you is appointed by us to a position of authority, he should bring everything, big or small, and whatever he is given therefrom he should take, and he should restrain himself from taking that which is forbidden.