Dennis ixohoxi posted a pointer to a transliterated arabic sample.
  I got a small bit of that file 
  
    --- arab-qur.txt ------------------------
    ALM

    DHAALIKA AL-KITAAB LAA RAYB FE-HI HUDA
    LI-AL-MUTTAQEN

    'ALLADHENA YU'MINON BI-AL-GHAYB WA-YUQEMON
    AS.-S.ALAAH WA-MIN MAA RAZAQNAA-HUM YUNFIQON

    WA-'ALLADHENA YU'MINON BI-MAA UNZILA 'ILAY-KA
    WA-MAA UNZILA MIN QABLI-KA WA-BI-AL-'AAKHIRAH
    HUM YOQINON

    'OLAA'IKA cALAA HUDA MIN RABB-HIM WA-'OLAA'IKA
    HUM AL-MUFLIH.ON

    'INNA 'ALLADHENA KAFARO SAWAA' cALAY-HIM
    'A-ANDHARTA-HUM 'AM LAM TUNDHIR-HUM LAA
    YU'MINON

    KHATAMA 'ALLAAH cALAA QULOB-HIM WA-cALAA
    SAMc-HIM WA-cALAA ABS.AAR-HIM GHISHAAWAH
    WA-LA--HUM cADHAAB cAZ.EM
    -----------------------------------------
  
  Then tried, just for fun, to turn it into pseudo-Voynichese
  by simple letter substitutions.  I came up with this:
  
    cat arab-qur.txt | sed -f arab-to-voyn.sed > voyn-qur.txt
  
    --- arab-to-voyn.sed ------------------------
    s/c/C/g
    s/[. ][. ]*/-.-/g
    s/^/-/g
    s/$/-/g
    s/AA-/AHA-/g
    s/AA/A-A/g
    s/W/q/g
    s/qA/qo/g
    s/A-/y.-/g
    s/A/o/g
    s/O/a/g
    s/S/sch/g
    s/R/tch/g
    s/N/l/g
    s/M/r/g
    s/DH/cthe/g
    s/KH/ckh/g
    s/GH/cth/g
    s/Q/ke/g
    s/F/cfh/g
    s/B-/shy.-/g
    s/B/she/g
    s/I-/aiin.-/g
    s/I/ee/g
    s/E-/ain.-/g
    s/E/e/g
    s/K/kch/g
    s/LL/p/g
    s/L/s/g
    s/T/ch/g
    s/D/che/g
    s/Z/ckhe/g
    s/YU/dol/g
    s/Y/d/g
    s/U-/am.-/g
    s/U/ol/g
    s/H/rch/g
    s/C/sh/g
    s/'/k/g
    s/-//g
    s/[.][.][.]*/./g
    ---------------------------------------------

  Result:

    --- voyn-qur.txt ------------------------
    osr

    cthey.oseekchy.oskcheechy.oshy.sorchy.tchodshy.cfhain.rchaiin.rcholchey.
    saiin.osrolchchokeel

    kopoctheely.dolkreelal.sheaiin.oscthodshy.qodolkeeral
    osch.sch.osy.orch.qoreel.rorchy.tchockheokelorchy.rcholr.dollcfheekeal

    qokopoctheely.dolkreelal.sheaiin.rorchy.ollckheeesy.keesodkchy.
    qororchy.ollckheeesy.reel.keoshesaiin.kchy.qosheaiin.osky.ockheetchorch
    rcholr.dakeeelal

    kasy.okeekchy.shosorchy.rcholchey.reel.tchosheshy.rcheer.qokasy.okeekchy.
    rcholr.osrolcfhseerch.al

    keelly.kopoctheely.kchocfhotcha.schoqook.shosodrcheer
    ky.olctheotchchy.rcholr.kor.sor.chollctheeetchrcholr.sorchy.
    dolkreelal

    ckhochory.kopy.orch.shosorchy.keolsashy.rcheer.qoshosorchy.
    schorshrcheer.qoshosorchy.oshesch.y.otchrcheer.ctheeschrchy.oqorch
    qosy.rcholr.shocthey.oshy.shockhe.er
    -----------------------------------------