It is narrated from Sayyiduna Abd al-Rahman bin Awf (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings be upon him) said: "The official ('amil), when he is appointed and takes what is due and gives what is due, is like one who strives (mujahid) in the path of Allah until he returns to his home."
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 279