
Councils of Faith: Lateran IV (1215)

provide suitable men, powerful in work and word, to exercise with fruitful result the office of preaching; who…diligently visiting the people committed to them, may instruct them by word and example.
These men are to be the bishops’ coadjutors and assistants, not only in the office of preaching but also in hearing confessions, imposing penances, and in other matters that pertain to the salvation of souls.