Catechism of the Catholic Church §2507 — excerpt
Respect for the reputation and honor of persons forbids all detraction and calumny in word or attitude.
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.