justify to

justify (something) to (one)

To attempt to prove that something is just, right, or valid to one. You really don't need to justify your decision to me. You're an adult, so you can do as you like. She is being asked to justify her actions to the board of directors.
See also: justify, to
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

justify something to someone

to explain something to someone and show why it is necessary. Please try to justify this to the voters. I can justify your action to no one.
See also: justify, to
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also:
References in classic literature ?
(3) that during their military movement they should have at their head a man who could justify to himself and to them the deceptions, robberies, and murders which would have to be committed during that movement.
The goal was for Justify to run in a major race this summer, likely the Travers Stakes at Saratoga, and be pointed toward the $5 million Breeders' Cup Classic on Nov.
The latest betting odds favor Justify to finish first in the 2018 Belmont Stakes Saturday after already having done so in the Kentucky Derby and Preakness Stakes.
"Sentinel's success has been closely linked to our ability to successfully justify to our customers the financial benefits of a converged AVVID (Cisco's Architecture for Voice, Video and Integrated Data) solution," said Robert Keblusek, vice president business development at Sentinel Technologies, Inc., a Cisco IP-Telephony Specialized Channel Partner in Downers Grove, Illinois.
But Smith turned it into an advantage, gunning Justify to the lead and defying any horse to challenge.
Betting site 5Dimes has even odds for Justify to win at Belmont, while the field received -130 odds.