CONFIRMATION
Paul and Barnabas went to Lystra, Iconium, and Antioch, confirming the souls of the disciples, and exhorting them to persist in the faith.
Judas and Silas, messengers from Jerusalem to Antioch, being prophets, exhorted the brothers with abundance of words, confirming them.
Again Paul and Silas passed through Syria and Cilicia, confirming the churches (Acts 14:22; 15:32, 41).
These passages, with that of Acts. 28:23, are the totality in which the word “episterizõ” appears.
There is no idea of any rite here; nor anything that has to do with what is currently called “confirmation.”