confirm in

confirm (one) in (something)

To incorporate one more thoroughly into a religion through a specific ceremony. The bishop will confirm the students in the church later this year.
See also: confirm
Farlex Dictionary of Idioms.

confirm someone in something

to perform a religious rite that ties one more closely to one's religion. They confirmed her in the church this morning.
See also: confirm
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • confirm
  • confirm (one) in (something)
  • confirmed
  • bring (someone or something) up to date
  • bring up to date
  • bring up-to-date
  • include
  • include (one) in (something)
  • include in
  • cat in gloves catches no mice