'Consecrate Yourselves' in the Bible

And he will say to them, Hear me, ye Levites: now consecrate yourselves and consecrate the house of Jehovah the God of your fathers, and bring forth the uncleanness from the holy place.

And slaughter ye the passover and consecrate yourselves, and prepare for your brethren to do according to the word of Jehovah by the hand of Moses.