1 The all-wise Sige then announced the production of the four-and-twenty elements to him as follows:— Along with Monotes there coexisted Henotes, from which sprang two productions, as we have remarked above, Monas and Hen, which, added to the other two, make four, for twice two are four. And again, two and four, when added together, exhibit the number six. And further, these six being quadrupled, give rise to the twenty-four forms. And the names of the first Tetrad, which are understood to be most holy, and not capable of being expressed in words, are known by the Son alone, while the father also knows what they are.
The other names which are to be uttered with respect, and faith, and reverence, are, according to him, Arrhetos and Sige, Pater and Aletheia. Now the entire number of this Tetrad amounts to four-and-twenty letters; for the name Arrhetos contains in itself seven letters, Seige five, Pater five, and Aletheia seven. If all these be added together— twice five, and twice seven— they complete the number twenty-four. In like manner, also, the second Tetrad, Logos and Zoe, Anthropos and Ecclesia, reveal the same number of elements.
Moreover, that name of the Saviour which may be pronounced, viz., Jesus [᾿Ιησοῦς], consists of six letters, but His unutterable name comprises four-and-twenty letters. The name Christ the Son (υἱὸς Χρειστός) comprises twelve letters, but that which is unpronounceable in Christ contains thirty letters. And for this reason he declares that He is Alpha and Omega, that he may indicate the dove, inasmuch as that bird has this number [in its name].
Source: Adversus haereses (New Advent)