'Sanctify' in the Bible

And Joshua said unto the people, Sanctify yourselves; for tomorrow Jehovah will do wonders among you.

Up, sanctify the people, and say, Sanctify yourselves against tomorrow: for thus saith Jehovah, the God of Israel, There is a devoted thing in the midst of thee, O Israel; thou canst not stand before thine enemies, until ye take away the devoted thing from among you.