Roman Catechism 24.17

Chapter 24 — Part III: The Decalogue — The First Commandment

Section 17. But who can desire a stronger or more convincing proof than that which is supplied by the admirable praises given in Scripture to the Saints? For there are not wanting eulogies which God Himself pronounced on some of the Saints. If, then, Holy Writ celebrates their praises, why should not men show them singular honour ?