“We condemn,” says he, “those who affirm that baptism does not do away all sins, because we know that full cleansing is conferred by these mysteries.” We also say this; but you do not say that infants are also by those same mysteries freed from the bonds of their first birth and of their hateful descent. On which account it behoves you, like other heretics also, to be separated from the Church of Christ, which holds this of old time.
Reproduced in full. Translation: Nicene and Post-Nicene Fathers, series 1, vol. 5 (Schaff, 1887), public domain (Public domain).