Victorinus

“ Moreover, we find in a certain Greek codex αντεμος, which letters being reckoned up, you will find to give the number as above: α one, ν fifty, τ three hundred, ε five, μ forty, ο seventy, ς two hundred,—which together makes six hundred and sixty-six, according to the Greeks. ”

“ It is called a contempt when God is provoked, because idols are worshipped instead of God, or when the dogma of heretics is introduced in the churches. But it is a turning away because stedfast men, seduced by false signs and portents, are turned away from their salvation. ”

“ Yes (as I also have said) , in the sight of men. Magicians do these things, by the aid of the apostate angels, even to this day. He shall cause also that a golden image of Antichrist shall be placed in the temple at Jerusalem, and that the apostate angel should enter, and thence utter voices and oracles. Moreover, he himself shall contrive that his servants and children should receive as a mark on their foreheads, or on their right hands, the number of his name, lest any one should buy or sell them. ”