Ark: in the Tabernacle--Called the Ark of the Covenant: Carried by Kohathites
Source: Nav
Numbers 3:30, 31
and the leader of the families of the Kohathites was Elizaphan son of Uzziel. / Their duties were the ark, the table, the lampstand, the altars, the articles of the sanctuary used with them, and the curtain—all the service for these items.
Numbers 4:4, 15
This service of the Kohathites at the Tent of Meeting regards the most holy things. / 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.
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 15:2, 15
Then David said, “No one but the Levites may carry the ark of God, because the LORD has chosen them to carry the ark of the LORD and to minister before Him forever.” / And the Levites carried the ark of God on their shoulders with the poles, as Moses had commanded in accordance with the word of the LORD.