Catechism of the Catholic Church §132 — excerpt
"Therefore, the study of the sacred page should be the very soul of sacred theology. the ministry of the Word, too - pastoral preaching, catechetics and all forms of Christian instruction, among which the liturgical homily should hold pride of place - is healthily nourished and thrives in holiness through the Word of Scripture."
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 24