In a work called Against Heresies, Irenaeus writes concerning one of the many groups whose teachings he opposed: “They declare that Judas the traitor was thoroughly acquainted with these things, and that he alone, knowing the truth as none of the others did, accomplished the mystery of the betrayal.
Teoses „Ketserite vastu ” kirjutab Eirenaios ühe rühmitise kohta paljude seast, mille õpetusi ta taunis:„ Nad väidavad, et reetur Juudas oli nende asjadega hästi kursis ja et tema üksi, mõistes tõde selgemini kui keegi teine, viis täide reetmise müsteeriumi.