Ignatius of Antioch, Epistle to the Trallians 11
So run from those evil offshoots. Their fruit brings death, and whoever tastes it dies at once. These are not the Father's planting (Matthew 15:13).
If they were, they would show themselves as branches of the cross, and their fruit would never decay. Through that cross, in his suffering, he calls you, for you are his members.
Greek
Φεύγετε οὖν τὰς κακὰς παραφυάδας τὰς γεννώσας καρπὸν θανατηφόρον, οὗ ἐὰν γεύσηταί τις, παῤ αὐτὰ ἀποθνήσκει. οὗτοι γὰρ οὔκ εἰσιν φυτεία πατρός, 2, εἰ γὰρ ἦσαν, ἐφαίνοντο ἂν κλάδοι τοῦ σταυροῦ, καὶ ἦν ἂν ὁ καρπὸς αὐτῶν ἄφθαρτος: δἰ οὗ ἐν τῷ πάθει αὐτοῦ προσκαλεῖταν ὑμᾶς ὄντας μέλη αὐτοῦ.