It was narrated by Prophet Muhammad ﷺ that when someone is appointed to an administrative post and provide him with an allowance, anything he takes beyond that is unfaithful dealing. Omar Suleiman dives into this hadith and talks about the importance of being a faithful employee — and not only faithful in actions but faithful with money and goods.
Hadith #21 – The Characteristics of a Pious Employee
Hadith #21 Notes