'Ministry' in the Bible

Following proscriptions laid down by his father David, Solomon appointed divisions of priests for their service as well as descendants of Levi for duties of praise and ministry before the priests consistent with the daily rules. Furthermore, because David, the man of God, had commanded it, Solomon also appointed gatekeepers to serve by divisions at every gate of the Temple.

Hezekiah appointed the priestly divisions and the divisions of the descendants of Levi, each according to their service duties, including both priests and descendants of Levi who offered morning and evening burnt offerings, peace offerings, general ministry, thanksgiving, and praise in the gateways to the LORD's campgrounds.