Tradition
St. Cyril of Jerusalem
Catechetical Lectures
Book 20 › Introduction
(On the Mysteries. II.)
Of Baptism.
Romans 6:3-14
Do you not know, that so many of us as were baptized into Jesus Christ, were baptized into His death? etc.....for you are not under the Law, but under grace.
Source: Catechetical Lectures (New Advent)