Matthew 24:4

Tertullian The Prescription Against Heretics

neither ought their existence to surprise us, for it was foretold that they should come to pass;[3]

Origen Against Celsus Book VI

nor what the Saviour in the Gospels[232]

Cyprian Treatise XI Exhortation to Martyrdom Addressed to Fortunatus

And He shall send His angels with a great trumpet, and they shall gather together His elect from the four winds, from the heights of heaven, even into the farthest bounds thereof."[87]

A Treatise on Re-Baptism by an Anonymous Writer

in Jesus, which is "the only name given under heaven whereby we must be saved," death is reasonably despised, although, if they continue as they are, they cannot be saved, because they have not sought the Lord after the invocation of His name upon them,-even as those who, on account of false Christs, perchance have refused to believe, of whom the Lord says, "Take heed that no man lead you into error. For many shall come in my name, saying, I am Christ, and shall lead many into error."[35]

Archelaus Acts of the Disputation with the Heresiarch Manes

If they shall say unto you, Behold, he is in the desert; go not forth: if they shall say, Behold, he is in the secret chambers; believe it not."[359]

Didache

1. See that no one cause thee to err[68]