Roman Catechism 16.90

Chapter 16 — Part II: The Sacraments — Baptism

Section 90. This was foretold long before by Ezechiel, through whom God said: I will pour upon you clean water, and you shall be cleansed from all your filthiness. The Apostle also, writing to the Corinthians, after having enumerated a long catalogue of sins, adds: such you were, but you are washed, but you are sanctified.