For, as we have said, when the Saviour was washed, then the water was cleansed for our baptism, that a laver might be ministered to the people who were to come. Moreover, it behoved that in Christ’s baptism should be signified those things which the faithful obtain by baptism.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Ambrosiaster, Serm. 12. 4