Catechism of the Catholic Church §2200 — excerpt
Observing the fourth commandment brings its reward: "Honor your father and your mother, that your days may be long in the land which the LORD your God gives you."
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.