1 This very thing, too, still further demonstrates their opinion false, and their fictitious system untenable, that they endeavour to bring forward proofs of it, sometimes through means of numbers and the syllables of names, sometimes also through the letter of syllables, and yet again through those numbers which are, according to the practice followed by the Greeks, contained in [different] letters—[this, I say,] demonstrates in the clearest manner their overthrow or confusion, as well as the untenable and perverse character of their [professed] knowledge.
For, transferring the name Jesus, which belongs to another language, to the numeration of the Greeks, they sometimes call it “Episemon,” as having six letters, and at other times “the Plenitude of the Ogdoads,” as containing the number eight hundred and eighty-eight. But His [corresponding] Greek name, which is “Soter,” that is, Saviour, because it does not fit in with their system, either with respect to numerical value or as regards its letters, they pass over in silence.
Yet surely, if they regard the names of the Lord, as, in accordance with the preconceived purpose of the Father, by means of their numerical value and letters, indicating number in the Pleroma, Soter, as being a Greek name, ought by means of its letters and the numbers [expressed by these], in virtue of its being Greek, to show forth the mystery of the Pleroma. But the case is not so, because it is a word of five letters, and its numerical value is one thousand four hundred and eight. But these things do not in any way correspond with their Pleroma; the account, therefore, which they give of transactions in the Pleroma cannot be true.
Source: Adversus haereses (New Advent)