'Ministering' in the Bible

and they are ministering before the tabernacle of the tent of meeting, in song, till the building by Solomon of the house of Jehovah in Jerusalem; and they stand according to their ordinance over their service.

But [the line of] Aaron and his sons made offerings on the altar of burnt offering and on the altar of incense, ministering for all the work of the Holy of Holies (Most Holy Place), and [they did so] to make atonement for Israel, according to all that Moses, God’s servant, had commanded.

And certain of them had the charge of the ministering vessels, that they should bring them in and out by tale.

The descendants of Amram included Aaron and Moses. Aaron had been set apart to consecrate the most holy things, with the intent that he and his sons should present offerings in the LORD's presence forever, ministering to him and pronouncing blessings in his name forever.

These divisions of the gatekeepers, under their leading men, had duties for ministering in the Lord’s temple, just as their brothers did.