before the ark

1 Chronicles 16:4-6
David appointed some of the Levites to minister before the ark of the LORD, to celebrate, to give thanks, and to praise the LORD, the God of Israel. . . .

1 Chronicles 15:17-24
So the Levites appointed Heman son of Joel; from his brothers, Asaph son of Berechiah; and from their brothers the Merarites, Ethan son of Kushaiah; . . .

1 Chronicles 25:1-6
Additionally, David and the commanders of the army set apart some of the sons of Asaph, Heman, and Jeduthun to prophesy with the accompaniment of lyres, harps, and cymbals. The following is the list of the men who performed this service: . . .

as every

2 Chronicles 8:14
In keeping with the ordinances of his father David, he appointed the divisions of the priests over their service, and the Levites for their duties to offer praise and to minister before the priests according to the daily requirement. He also appointed gatekeepers by their divisions at each gate, for this had been the command of David, the man of God.

Ezra 3:4
They also celebrated the Feast of Tabernacles, as it is written, and offered burnt offerings daily, based on the number prescribed for each day.