'Sanctify Them' in the Bible

The Lord said to Moses, "Go to the people and sanctify them today and tomorrow, and make them wash their clothes

Let the priests also, who approach the Lord, sanctify themselves, lest the Lord break through against them."

So you are to sanctify them, and they will be most holy; anything that touches them will be holy.

"You are to anoint Aaron and his sons and sanctify them, so that they may minister as my priests.