Nicene and Post-Nicene Fathers: Series I/Volume IV/Donatist Controversy/On Baptism/Book VI/Chapter 16
27. The answer to which is: The judgment of the whole Catholic Church is that heretics, being already baptized with the baptism of Christ, although in heresy, should not be rebaptized on coming to the Church. For if there is no remission of sins among sinners, neither can sinners within the Church remit sins; and yet those who have been baptized by them are not rebaptized.
- Segermi church province of Byzacium. A Nicomedes occurs in Cypr. Epp. lvii., lxvii., lxx.
- Conc. Carth, sec. 9.