1 Chronicles 15:14

So the priests and the Levites hallowed themselves to bring up the ark of Jehovah the God of Israel.

Leviticus 10:3

And Moses said to Aaron, This is what Jehovah spoke, saying, I will be hallowed in them that come near me, and before all the people I will be glorified. And Aaron was silent.

2 Chronicles 29:15

And they gathered their brethren, and hallowed themselves, and came, according to the commandment of the king by the words of Jehovah, to cleanse the house of Jehovah.

2 Chronicles 29:34

Only the priests were too few, and they could not flay all the burnt-offerings; therefore their brethren the Levites helped them, until the work was ended, and until the priests had hallowed themselves; for the Levites were more upright in heart to hallow themselves than the priests.

Joel 2:16-17

gather the people, hallow the congregation, assemble the elders, gather the children, and those that suck the breasts; let the bridegroom go forth from his chamber, and the bride from her closet.

Treasury of Scripture Knowledge

Summary

So the priests and the Levites sanctified themselves to bring up the ark of the LORD God of Israel.

Bible References

Sanctified

Leviticus 10:3
And Moses said to Aaron, This is what Jehovah spoke, saying, I will be hallowed in them that come near me, and before all the people I will be glorified. And Aaron was silent.
2 Chronicles 29:15
And they gathered their brethren, and hallowed themselves, and came, according to the commandment of the king by the words of Jehovah, to cleanse the house of Jehovah.
Joel 2:16
gather the people, hallow the congregation, assemble the elders, gather the children, and those that suck the breasts; let the bridegroom go forth from his chamber, and the bride from her closet.