On Baptism, Against the Donatists 125Chapter 13

20. Januarius of Lambaese said: "Following the authority of the holy Scriptures, I pronounce that all heretics should be baptized, and so admitted into the holy Church."

21. To him we answer, that, following the authority of the holy Scriptures, a universal Council of the whole world decreed that the baptism of Christ was not to be disavowed even when found among heretics. But if he had brought forward any proof from the Scriptures, we should have shown either that they were not against us, or even that they were for us, as we proceed to do with him who follows.