1 Chronicles 15:12

And said to them, You are the heads of the families of the Levites: make yourselves holy, you and your brothers, so that you may take the ark of the Lord, the God of Israel, to the place which I have made ready for it.

2 Chronicles 35:6

And put the Passover lamb to death, and make yourselves holy, and make it ready for your brothers, so that the orders given by the Lord through Moses may be done.

Exodus 19:14-15

Then Moses went down from the mountain to the people, and made the people holy; and their clothing was washed.

1 Chronicles 9:34

These were heads of families of the Levites in their generations, chief men; they were living at Jerusalem.

1 Chronicles 15:1

And David made houses for himself in the town of David; and he got ready a place for the ark of God, and put up a tent for it.

1 Chronicles 15:3

And David made all Israel come together at Jerusalem, to take the ark of the Lord to its place, which he had got ready for it.

1 Chronicles 15:14

So the priests and the Levites made themselves holy to take up the ark of the Lord, the God of Israel.

1 Chronicles 24:31

Selection was made of these in the same way as of their brothers the sons of Aaron, David the king being present, with Zadok, and Ahimelech, and the heads of families of the priests and of the Levites; the families of the chief in the same way as those of his younger brother.

2 Chronicles 5:11

Now when the priests had come out of the holy place, (for all the priests who were present had made themselves holy, not keeping to their divisions;

2 Chronicles 29:4-5

And he sent for the priests and the Levites, and got them together in the wide place on the east side,

2 Chronicles 30:15

Then on the fourteenth day of the second month they put the Passover lambs to death: and the priests and the Levites were shamed, and made themselves holy and took burned offerings into the house of the Lord.

Ezekiel 48:11

For the priests who have been made holy, those of the sons of Zadok who kept the orders I gave them, who did not go out of the right way when the children of Israel went from the way, as the Levites did,

John 17:17

Make them holy by the true word: your word is the true word.

Romans 12:1-2

For this reason I make request to you, brothers, by the mercies of God, that you will give your bodies as a living offering, holy, pleasing to God, which is the worship it is right for you to give him.

Revelation 5:9-10

And their voices are sounding in a new song, saying, It is right for you to take the book and to make it open: for you were put to death and have made an offering to God of your blood for men of every tribe, and language, and people, and nation,

Treasury of Scripture Knowledge

Summary

And said unto them, Ye are the chief of the fathers of the Levites: sanctify yourselves, both ye and your brethren, that ye may bring up the ark of the LORD God of Israel unto the place that I have prepared for it.

Bible References

Ye are the chief

1 Chronicles 9:34
These were heads of families of the Levites in their generations, chief men; they were living at Jerusalem.
1 Chronicles 24:31
Selection was made of these in the same way as of their brothers the sons of Aaron, David the king being present, with Zadok, and Ahimelech, and the heads of families of the priests and of the Levites; the families of the chief in the same way as those of his younger brother.

Sanctify

1 Chronicles 15:14
So the priests and the Levites made themselves holy to take up the ark of the Lord, the God of Israel.
Exodus 19:14
Then Moses went down from the mountain to the people, and made the people holy; and their clothing was washed.
2 Chronicles 5:11
Now when the priests had come out of the holy place, (for all the priests who were present had made themselves holy, not keeping to their divisions;
2 Chronicles 29:4
And he sent for the priests and the Levites, and got them together in the wide place on the east side,
2 Chronicles 30:15
Then on the fourteenth day of the second month they put the Passover lambs to death: and the priests and the Levites were shamed, and made themselves holy and took burned offerings into the house of the Lord.
2 Chronicles 35:6
And put the Passover lamb to death, and make yourselves holy, and make it ready for your brothers, so that the orders given by the Lord through Moses may be done.
Ezekiel 48:11
For the priests who have been made holy, those of the sons of Zadok who kept the orders I gave them, who did not go out of the right way when the children of Israel went from the way, as the Levites did,
John 17:17
Make them holy by the true word: your word is the true word.
Romans 12:1
For this reason I make request to you, brothers, by the mercies of God, that you will give your bodies as a living offering, holy, pleasing to God, which is the worship it is right for you to give him.
Revelation 5:9
And their voices are sounding in a new song, saying, It is right for you to take the book and to make it open: for you were put to death and have made an offering to God of your blood for men of every tribe, and language, and people, and nation,

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain