2 Chronicles 29:5
"Listen to me, O Levites," He said. "Consecrate yourselves now and consecrate the house of the LORD, the God of your fathers. Remove from the Holy Place every impurity.

2 Chronicles 29:15
When they had assembled their brothers and consecrated themselves, they went in to cleanse the house of the LORD, according to the command of the king by the words of the LORD.

Nehemiah 10:37
Moreover, we will bring to the priests at the storerooms of the house of our God the firstfruits of our dough, of our grain offerings, of the fruit of all our trees, and of our new wine and oil. A tenth of our produce belongs to the Levites, for they should receive tithes in all the towns where we labor.

Ezekiel 40:38
There was a chamber with a doorway by the portico in each of the inner gateways. There the burnt offering was to be washed.