In order to revive our lost linguistic heritage, I have strived to investigate the rare manuscripts, which includes a wealth of scientific material in it, especially the morphological investigation, which is a rare commodity, in a scientific atmosphere that was shipped with weak marginal investigative work, so we chose a manuscript: (Explanation) On the verses of Ptolemy in the conjugation of the omitted faa and laam verb in the word and order in the form of the command, by Abd al-Rahman al-Sallasi ( "d. 1118 AH")), especially since the manuscript deals with the topic of derivation and conjugation.