Marcellus of Zama 1 said: "Since sins are remitted only in the baptism of the Church, he who does not baptize a heretic holds communion with a sinner." 2
Zama was in ecclesiastical province of Numidia. For Marcellus, see Cypr. Ep. lxvii. ↩
Conc. Carth. sec. 53. ↩