This is, however, the earliest reference to a Bashmuric dialect, which has not been conclusively identified in any of surviving Coptic text.[7] Athanasius' Necklace, moreover, is the first major treatment of Sahidic and he also wrote a commentary (sharḥ) on his Sahidic grammar.[4] A Sahidic sullam (Copto-Arabic dictionary) is also attributed to him.[3] The Sahidic in Athanasius' account of the rite of the chrism was supplied by his colleague Gabriel, bishop of al-Marg.