Numbers 7:9

But to the sons of Kohath he gave nothing, because they were assigned the care of the holy things which they carried on their shoulders [when the tabernacle was moved].

Numbers 3:31

Now their responsibilities involved the ark, the table [on which the bread of the Presence was placed], the lampstand, the altars, the utensils of the sanctuary with which the priests minister, and the curtain, and all the service concerning them.

2 Samuel 6:13

And when those who were carrying the ark of the Lord [by its poles] had gone six paces, he sacrificed an ox and a fatling.

Numbers 4:4-16

This is the work and responsibility of the sons of Kohath in the Tent of Meeting (tabernacle): the most holy things.

2 Samuel 6:6

When they came to Nacon’s threshing floor, Uzzah reached out [with his hand] to the ark of God and took hold of it, because the oxen [stumbled and] nearly overturned it.

1 Chronicles 15:3

And David assembled all Israel at Jerusalem to bring up the ark of the Lord to the place which he had prepared for it.

1 Chronicles 15:13

Because you did not [carry it as God directed] the first time, the Lord our God made an [angry] outburst against us, for we did not seek Him in accordance with the ordinance.”

1 Chronicles 23:26

Also, the Levites will no longer need to carry the tabernacle and all its utensils for its service.”

Treasury of Scripture Knowledge

Summary

But unto the sons of Kohath he gave none: because the service of the sanctuary belonging unto them was that they should bear upon their shoulders.

Bible References

Because

Numbers 3:31
Now their responsibilities involved the ark, the table [on which the bread of the Presence was placed], the lampstand, the altars, the utensils of the sanctuary with which the priests minister, and the curtain, and all the service concerning them.
Numbers 4:4
This is the work and responsibility of the sons of Kohath in the Tent of Meeting (tabernacle): the most holy things.
2 Samuel 6:6
When they came to Nacon’s threshing floor, Uzzah reached out [with his hand] to the ark of God and took hold of it, because the oxen [stumbled and] nearly overturned it.
1 Chronicles 15:3
And David assembled all Israel at Jerusalem to bring up the ark of the Lord to the place which he had prepared for it.
1 Chronicles 23:26
Also, the Levites will no longer need to carry the tabernacle and all its utensils for its service.”