Roman Catechism 6.17

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

Section 17. It is not, however, our belief that the body of Christ alone was interred. The above words propose, as the principal object of our belief, that God was buried; as according to the rule of Catholic faith we also say with the strictest truth that God died, and that God was born of a virgin. For as the Divinity was never separated from His body which was laid in the sepulchre, we truly confess that God was buried.