1 Chronicles 15:14

So the priests and the Levites hallowed themselves, - to bring up the ark of Yahweh, God of Israel.

Leviticus 10:3

Then said Moses unto Aaron - The very thing, that Yahweh spake, saying - In them that draw near to me, must I be hallowed, And before the faces of all the people, must I get myself honour, - And Aaron, was dumb.

2 Chronicles 29:15

and they gathered together their brethren, who hallowed themselves, and came in according to the command of the king, in the things of Yahweh, - to purify the house of Yahweh.

2 Chronicles 29:34

Only, the priests, were too few, and were unable to flay all the ascending-sacrifices, - so their brethren the Levites strengthened them, until the work was complete 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 a convocation, collect the elders, gather the children, and the sucklings of the breasts, - let the bridegroom, come forth, from his chamber, and the bride from her bower:

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
Then said Moses unto Aaron - The very thing, that Yahweh spake, saying - In them that draw near to me, must I be hallowed, And before the faces of all the people, must I get myself honour, - And Aaron, was dumb.
2 Chronicles 29:15
and they gathered together their brethren, who hallowed themselves, and came in according to the command of the king, in the things of Yahweh, - to purify the house of Yahweh.
Joel 2:16
Gather the people, hallow a convocation, collect the elders, gather the children, and the sucklings of the breasts, - let the bridegroom, come forth, from his chamber, and the bride from her bower: