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.

Matthew 5:15
Neither do people light a lamp and put it under a basket. Instead, they set it on a stand, and it gives light to everyone in the house.

Exodus 25:10
And they are to construct an ark of acacia wood, two and a half cubits long, a cubit and a half wide, and a cubit and a half high.

Exodus 25:23
You are also to make a table of acacia wood two cubits long, a cubit wide, and a cubit and a half high.

Exodus 25:31
Then you are to make a lampstand of pure, hammered gold. It shall be made of one piece, including its base and shaft, its cups, and its buds and petals.

Exodus 27:1
"You are to build an altar of acacia wood. The altar must be square, five cubits long, five cubits wide, and three cubits high.

Exodus 27:2
Make a horn on each of its four corners, so that the horns are of one piece, and overlay it with bronze.

Exodus 30:1
"You are also to make an altar of acacia wood for the burning of incense.

Numbers 3:30
and the leader of the families of the Kohathites was Elizaphan son of Uzziel.

Numbers 3:32
The chief of the leaders of the Levites was Eleazar son of Aaron the priest; he oversaw those responsible for the duties of the sanctuary.

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.

And their charge shall be the ark, and the table, and the candlestick, and the altars, and the vessels of the sanctuary with which they minister, and the hanging, and all the service thereof.