Sayyiduna Adi bin Amirah al-Kindi (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever among you we appoint to a task, and he then embezzles from us a needle or anything more than that, it is embezzlement which he will bring with him on the Day of Resurrection." At this a black man from the tribe of Azd stood up - it is as though I am looking at him - and said: O Messenger of Allah! Take back your assignment from me. He (peace and blessings be upon him) said: "What is wrong with you?" He said: I heard you (peace and blessings be upon him) say such and such. He (peace and blessings be upon him) said: I still say it now: "Whoever among you we appoint to a task, let him bring all of it, little and much; then whatever he is given from it he may take, and whatever he is forbidden he should refrain from."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14332