Catechism of the Catholic Church §2641 — excerpt
"[Address] one another in psalms and hymns and spiritual songs, singing and making melody to the Lord with all your heart." Like the inspired writers of the New Testament, the first Christian communities read the Book of Psalms in a new way, singing in it the mystery of Christ.
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.
Whole chapters cited: Jude 24 · Jude 25