Catechism of the Catholic Church §84 — excerpt
The apostles entrusted the "Sacred deposit" of the faith (the depositum fidei), contained in Sacred Scripture and Tradition, to the whole of the Church. "By adhering to [this heritage] the entire holy people, united to its pastors, remains always faithful to the teaching of the…
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: DV 10 # 1 · cf.1 Tim 6:20 · Pius XII, Apost. Const. Munificentissimus Deus, 1 November 1950: AAS 42 (1950), 756, taken along with the words of St. Cyprian, Epist. 66, 8: CSEL 3/2, 733: "The Church is the people united to its Priests, the flock adhering to its Shepherd."