'Charges' in the Bible

And the priests over their charges are standing, and the Levites with instruments of the song of Jehovah -- that David the king made, to give thanks to Jehovah, for to the age is His kindness, in David's praising by their hand -- and the priests are blowing trumpets over-against them, and all Israel are standing.

And he appointed, according to the order of David his father, the courses of the priests to their service, and the Levites to their charges, to praise and minister before the priests, as the duty of every day required: the porters also by their courses at every gate: for so had David the man of God commanded.

Beside their genealogy of males, from three years old and upward, even unto every one that entereth into the house of the LORD, his daily portion for their service in their charges according to their courses;

Both to the genealogy of the priests by the house of their fathers, and the Levites from twenty years old and upward, in their charges by their courses;

And he set the priests in their charges, and encouraged them to the service of the house of the LORD,