He will get his

(someone) will get (someone's)

Someone will incur the punishment that they rightly deserve. Now please don't take out some sort of vigilante justice on Leo. He'll get his in the end, don't you worry. She cheated off me during the test? Oh, she'll get hers, alright!
See also: get, will
Farlex Dictionary of Idioms.

He will get his.

 and She will get hers.
One will be punished for one's misdeeds. Jill: It seems like Fred can do any evil thing he wants. Jane: Don't worry. He'll get his. You may think you will always profit by your life of crime, but you'll get yours.
See also: get, he, will
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • (someone) will get (someone's)
  • pay the consequences
  • pay the piper
  • pay the piper, to
  • I don't rightly know
  • pay the fiddler
  • suffer the consequences
  • face the consequences
  • face the music
  • face the music, to