Catechism of the Catholic Church §893 — excerpt
The bishop is "the steward of the grace of the supreme priesthood," especially in the Eucharist which he offers personally or whose offering he assures through the priests, his co-workers.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.
Also cites: LG 26 · LG 26 # 3