The Church History of Eusebius 66The Heresy of the Ebionites.

1. The evil demon, however, being unable to tear certain others from their allegiance to the Christ of God, yet found them susceptible in a different direction, and so brought them over to his own purposes. The ancients quite properly called these men Ebionites, because they held poor and mean opinions concerning Christ.

2. For they considered him a plain and common man, who was justified only because of his superior virtue, and who was the fruit of the intercourse of a man with Mary. In their opinion the observance of the ceremonial law was altogether necessary, on the ground that they could not be saved by faith in Christ alone and by a corresponding life.

3. There were others, however, besides them, that were of the same name, but avoided the strange and absurd beliefs of the former, and did not deny that the Lord was born of a virgin and of the Holy Spirit. But nevertheless, inasmuch as they also refused to acknowledge that he pre-existed, being God, Word, and Wisdom, they turned aside into the impiety of the former, especially when they, like them, endeavored to observe strictly the bodily worship of the law.

4. These men, moreover, thought that it was necessary to reject all the epistles of the apostle, whom they called an apostate from the law; and they used only the so-called Gospel according to the Hebrews and made small account of the rest.

5. The Sabbath and the rest of the discipline of the Jews they observed just like them, but at the same time, like us, they celebrated the Lord's days as a memorial of the resurrection of the Saviour.

6. Wherefore, in consequence of such a course they received the name of Ebionites, which signified the poverty of their understanding. For this is the name by which a poor man is called among the Hebrews.