1 Chronicles 15:14

And the priests and the Levites sanctify themselves, to bring up the ark of Jehovah, God of Israel;

Leviticus 10:3

And Moses saith unto Aaron, 'It is that which Jehovah hath spoken, saying, By those drawing near to Me I am sanctified, and in the face of all the people I am honoured;' and Aaron is silent.

2 Chronicles 29:15

and they gather their brethren, and sanctify themselves, and come in, according to the command of the king in the matters of Jehovah, to cleanse the house of Jehovah,

2 Chronicles 29:34

Only, the priests have become few, and have not been able to strip the whole of the burnt-offerings, and their brethren the Levites strengthen them till the completion of the work, and till the priests sanctify themselves, for the Levites are more upright of heart to sanctify themselves than the priests.

Joel 2:16-17

Gather the people, sanctify an assembly, Assemble the aged, Gather infants and sucklings of the breasts, Go out let a bridegroom from his inner chamber, And a bride out of 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 saith unto Aaron, 'It is that which Jehovah hath spoken, saying, By those drawing near to Me I am sanctified, and in the face of all the people I am honoured;' and Aaron is silent.
2 Chronicles 29:15
and they gather their brethren, and sanctify themselves, and come in, according to the command of the king in the matters of Jehovah, to cleanse the house of Jehovah,
Joel 2:16
Gather the people, sanctify an assembly, Assemble the aged, Gather infants and sucklings of the breasts, Go out let a bridegroom from his inner chamber, And a bride out of her closet.