Then David said, None ought to carry the ark of God but the Levites: for them has the LORD chosen to carry the ark of God, and to minister to him forever.
He said to the Levites who taught all Yisra'el, who were holy to the LORD, Put the holy ark in the house which Shlomo the son of David king of Yisra'el did build; there shall no more be a burden on your shoulders: now serve the LORD your God, and his people Yisra'el.
At that time the LORD set apart the tribe of Levi, to bear the ark of the covenant of the LORD, to stand before the LORD to minister to him, and to bless in his name, to this day.
Moshe wrote this law, and delivered it to the Kohanim the sons of Levi, who bore the ark of the covenant of the LORD, and to all the elders of Yisra'el.
and they commanded the people, saying, When you see the ark of the covenant of the LORD your God, and the Kohanim the Levites bearing it, then you shall remove from your place, and go after it.
Yehoshua the son of Nun called the Kohanim, and said to them, Take up the ark of the covenant, and let seven Kohanim bear seven trumpets of rams' horns before the ark of the LORD.