purge (something) of (something)
1. To completely free or clean something of something unwanted. We'll need to purge the machine of the contaminated coolant before we begin operating it. Police have begun purging the streets of protesters.
2. To cleanse something of impure or sinful thoughts or feelings. I recommend you turn to prayer to purge your mind of those evil thoughts. Your obsessive focus on purging your congregation of sin has become a sin unto itself.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
purge someone or something of someone or something
to rid someone or something of someone or something. The medicine is designed to purge the patient of the deadly toxin. We purged the list of the delinquent members.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.