Confirm (one) in (something) verb phrase
To perform a religious sacrament, ritual or rite that ties one more closely to one's religion
The bishop is confirming the children in the church.
He was confirmed in the church yesterday.
The verb “confirm" should be conjugated according to its tense.
The verb "confirm" dates from 1250 to 1300; (Latin "confirmār" to strengthen), "confirm" also replaced Middle English "confermen".