Numbers 4:5
Whenever the camp sets out, Aaron and his sons are to go in, take down the veil of the curtain, and cover the Ark of the Testimony with it.

Numbers 4:15
When Aaron and his sons have finished covering the holy objects and all their equipment, as soon as the camp is ready to move, the Kohathites shall come and do the carrying. But they must not touch the holy objects, or they will die. These are the transportation duties of the Kohathites regarding the Tent of Meeting.

Numbers 7:9
But he did not give any to the Kohathites, since they were to carry on their shoulders the holy objects for which they were responsible.

Deuteronomy 10:8
At that time the LORD set apart the tribe of Levi to carry the ark of the covenant of the LORD, to stand before the LORD to serve Him, and to pronounce blessings in His name, as they do to this day.

1 Chronicles 23:27
For according to the final instructions of David, the Levites twenty years of age or older were counted,

2 Chronicles 35:3
To the Levites who taught all Israel and were holy to the LORD, Josiah said: "Put the holy ark in the temple built by Solomon son of David king of Israel. It is not to be carried around on your shoulders. Now serve the LORD your God and His people Israel.