1 John 2:18

Irenaeus Against Heresies Book III

Know ye therefore, that every lie is from without, and is not of the truth. Who is a liar, but he that denieth that Jesus is the Christ? This is Antichrist."[288]

Irenaeus Against Heresies Book IV

foreseeing by the Spirit those weak-minded persons who should be led astray.[4]

Clement of Alexandria Stromata Book III

Ex nobis exierunt, sed non erant ex nobis. Nam si fuissent ex nobis, permansissent utique nobiscum."[51]

Tertullian On Fasting

And how is it that he enjoins duties which belong to our God, and enjoins them to be offered to none other than our God? Either contend that the devil works with our God, or else let the Paraclete be held to be Satan. But you affirm it is "a human Antichrist: "for by this name heretics are called in John.[90]

Dubious Hippolytus Fragments

and even now are there many antichrists;[35]

Cyprian Epistle LXIX

They went out from us, but they were not of us; for if they had been of us, no doubt they would have continued with us."[20]

Cyprian Epistle LXXV

They went out from us, but they were not of us; for if they had been of us, they would have continued with us."[3]

Origen Commentary on Matthew Book XI

that is, at the consummation of the age in regard to which we may fitly say what is found in the Epistle of John, "It is the last hour."[2]