Chapter 16 — Part II: The Sacraments — Baptism
Section 100. Nor is there any discrepancy between the doctrine here taught and the practice of the primitive Church, which of old commanded the Jews, when preparing for Baptism, to observe a fast of forty successive days. (The fast thus imposed) was not enjoined as a work of satisfaction; but those who had received Baptism were thus admonished to devote some time to the uninterrupted exercise of fasting and prayer in honour of so great a Sacrament.