Some have thought from these words that the devil had a father, and asked who was the father of the devil. This is the error of the Manichæans. But our Lord calls the devil the father of a lie for this reason: Every one who lies is not the father of his own lie; for you may tell a lie, which you have received from another; in which case you have lied, but are not the father of the lie. But the lie wherewith, as with a serpent’s bite, the devil slew man. had no source but himself: and therefore he is the father a lie, as God is the Father of the truth.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Tr. xlii. s. 12, 13