in the trust of
in the trust of (someone)
In someone's care or protection. I knew I shouldn't have left such an expensive item in the trust of my assistant. Back in my day, it was normal to leave your kids in the trust of your neighbors if you had to step out for a while.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
*in the trust of someone
under the responsibility or in the care of someone. (*Typically: be ~; leave someone or something ~; place someone or something ~.) The state placed the orphan in the trust of the foster parents. Our bonds are left in the trust of our broker.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.