Riyad as-Salihin 675
Abu Dharr (May Allah be pleased with him) reported:
I said to Messenger of Allah (ﷺ): "Why do you not appoint me to an (official) position?" He (ﷺ) patted me on the shoulder with his hand and said, "O Abu Dharr, you are a weak man and it is a trust and it will be a cause of disgrace and remorse on the Day of Resurrection except for the one who takes it up with a full sense of responsibility and fulfills what is entrusted to him (discharges its obligations efficiently)." [Muslim] .
وعنه قال‏:‏ قلت يا رسول الله ألا تستعملني‏؟‏ فضرب بيده على منكبي ثم قال‏:‏ “يا أبا ذر إنك ضعيف، وإنها أمانة، وإنها يوم القيامة خزي وندامة، إلا من أخذها بحقها، وأدى  الذى عليه فيها” ‏(‏‏(‏رواه مسلم‏)‏‏)‏‏.‏