Sayyiduna Abu Dharr (may Allah be pleased with him) said: I said: O Messenger of Allah, appoint me as an official. He (peace and blessings be upon him) struck my shoulder with his hand, then said: "O Abu Dharr! You are weak, and this is a trust; it will be a cause of regret and disgrace on the Day of Resurrection, except for the one who fulfils its right."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب آداب القاضي / 20212