Tertullian

“ But the tares of Praxeas had then everywhere shaken out their seed, which having lain hid for some while, with its vitality concealed under a mask, has now broken out with fresh life. But again shall it be rooted up, if the Lord will, even now; but if not now, in the day when all bundles of tares shall be gathered together, and along with every other stumbling-block shall be burnt up with unquenchable fire. [13]
Footnotes ↑ The error of Praxeas appears to have originated in anxiety to maintain the unity of God ”

“ However, he is himself a liar from the beginning, [6] and whatever man he instigates in his own way; as, for instance, Praxeas. For he was the first to import into Rome from Asia this kind of heretical pravity, a man in other respects of restless disposition, and above all inflated with the pride of confessorship simply and solely because he had to bear for a short time the annoyance of a prison ”

“ Against Praxeas; [1]
In Which He Defends, in all Essential Points, the Doctrine of the Holy Trinity. [2]
[Translated by Dr. Holmes.]
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Chapter I.—Satan’s Wiles Against the Truth. How They Take the Form of the Praxean Heresy. Account of the Publication of This Heresy.
In various ways has the devil rivalled and resisted the truth. Sometimes his aim has been to destroy the truth by defending it. He maintains that there is one only Lord, the Almighty Creator of the world, in order that out of this doctrine of the unity he may fabricate a heresy. ”