Roman Catechism 6.16

Chapter 6 — Part I: The Creed — Article IV: Suffered Under Pontius Pilate, Was Crucified, Dead, and Buried

Section 16. Christ Was Really Buried — When we confess that He was buried, we do not make this, as it were, a distinct part of the Article, as if it presented any new difficulty which is not implied in what we have said of His death; for if we believe that Christ died, we can also easily believe that He was buried. The word buried was added in the Creed, first, that His death might be rendered more certain, for the strongest argument of a person's death is the proof that his body was buried; and, secondly, to render the miracle of His Resurrection more authentic and illustrious.