Then David said, “No one should carry the Ark of God except the Levites, for Adonai has chosen them to carry the Ark of Adonai and to serve Him forever.”
He said to the Levites who taught all Israel and who were consecrated to Adonai, “Put the holy Ark in the House which Solomon the son of King David of Israel built. Since it is no longer a burden on your shoulders now, serve Adonai your God and His people Israel.
At that time Adonai set the tribe of Levi apart to carry the Ark of the Covenant of Adonai, to stand before Adonai to serve Him and to pronounce blessings in His Name—as is the case to this day.
and they charged the people saying, “When you see the ark of the covenant of Adonai your God and the Levitical kohanim carrying it, then you must set out from your place and follow it.
So Joshua son of Nun summoned the kohanim and said to them, “Take up the ark of the covenant. Let seven kohanim carry seven shofarot of rams’ horns before the ark of Adonai.”