'Adi bin 'Umairah (May Allah bepleased with him) reported:
Messenger of Allah ﷺ said, "Whosoever among you is appointed by us to a position and he conceals from us even a needle or less, it will amount to misappropriation and he will be called upon to restore it on the Day of Resurrection". ('Adi bin 'Umairah added:) A black man from the Ansar stood up - I can see him still - and said: "O Messenger of Allah, take back from me your assignment." He (the Prophet ﷺ) said, "What has happened to you?" The man replied: "I have heard you saying such and such." He ﷺ said, "I say that even now: Whosoever from you is appointed by us to a position, he should render an account of everything, big or small, and whatever he is given therefrom, he should take and he should desist from taking what is unlawful".

[Muslim].

وعن عدي ابن عميرة رضي الله عنه قال: سمعت رسول الله ﷺ يقول: “من استعملناه منكم على عمل، فكتمنا مخيطًا فما فوقه، كان غلولاً يأتي به يوم القيامة” فقام إليه رجل أسود من الأنصار، كأني أنظر إليه ، فقال: يا رسول الله اقبل عني عملك، قال: “ومالك؟” قال سمعتك تقول كذا وكذا، قال: “وأنا أقوله الآن: من استعملناه على عمل فليجئ بقليله وكثيره، فما أوتي منه أخذ، وما نهي عنه انتهى، ((رواه مسلم)).