'Sanctify Yourselves' in the Bible

And he said to them, Hear me, Levites, now sanctify yourselves and sanctify the house of Jehovah, the God of your fathers, and carry out the filthiness out of the holy place.

And kill the passover lamb, and sanctify yourselves, and prepare your brothers so that they may do according to the Word of Jehovah by the hand of Moses.