ST. IGNATIUS OF ANTIOCH
“Make no mistake, brethren; the corrupters of families will not inherit the kingdom of God. If, then, those are dead who do these things according to the flesh, how much worse if, with bad doctrine, one should corrupt the faith of God for which Jesus Christ was crucified. Such a man, for becoming contaminated, will depart into unquenchable fire; and will anyone who listens to him.”
[ Letter to the Ephesians, Chap. 16,1 ]
St. Ignatius was, like St. Polycarp, a disciple of St. John.