'Duty' in the Bible

"The Lord has made you priest in place of Jehoiada. He has put you in charge in the Lord's temple of controlling any lunatic who pretends to be a prophet. And it is your duty to put any such person in the stocks with an iron collar around his neck.

{And when} he [was] at the Gate of Benjamin, there [was] {a sentry on duty} whose name [was] Irijah, the son of Shelemiah, the son of Hananiah, and he seized Jeremiah the prophet, {saying}, "You [are] deserting to the Chaldeans!"

From the city he took a court official who had been appointed over the warriors; seven trusted royal aides found in the city; the secretary of the commander of the army, who enlisted the people of the land for military duty; and 60 men from the common people who were found within the city.