Catechism of the Catholic Church §2139 — excerpt
Tempting God in words or deeds, sacrilege, and simony are sins of irreligion forbidden by the first commandment.
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.