About the Mystery of the Letters the mid-6th century, in which Mar Saba had played an important role. The anonymous author of the treatise declares he was prompted to the study of the secret meanings of the letters by the words of the Apocalypse, "I am the Alpha and Omega", and that he subsequently received a vision about them on Mount Sinai. The author proposes a re-modelled Greek alphabet reduced to 22 letters on the model of the 22 letters of Hebrew (discounting Xi Ξ and Psi Ψ), and with the Hebrew letter names. He then interprets these letters as symbolic figures of 22 works of
Hebrew alphabet table (correctly translating a Hebrew text with these letters would require using the spelling in the language from which the transliteration to Hebrew was originally made). The non-standard "ו׳" and "וו" are sometimes used to represent , which like , and appears in Hebrew slang and loanwords. The Sound (as "ch" in loch) is often transcribed "ch", inconsistently with the guidelines specified by the Academy of the Hebrew Language: חם → "cham"; סכך → "schach". Although the Bible does include a single occurrence of a final pe with a dagesh (Book of Proverbs 30, 6: ""), in modern Hebrew is