Among the numerous Jewish uṣūl al-dīn compositions in the Second Firkovitch Collection at the Russian National Library in St. Petersburg there is one that I have labelled “A Hamaḏānian Patchwork”. You might just as well call it “A Persian Carpet”. It is another magnificent specimen of “diachronic intertextualities”.
The treatise, which is partly preserved in ms. St. Petersburg, RNL, Yevr.-Arab. I 4881 and a few smaller fragments, is made up of many customised quotations, first and foremost from works by the chief Qāḍī Abū l-Ḥasan ʿAbd al-Ǧabbār b. Aḥmad al-Hamaḏānī (d. 415/1024), in particular his Muḥīṭ and Muġnī. A full breakdown of the text’s fabric will be presented in a separate publication.
Of the two samples given below, the first reproduces a passage which is also quoted in the extensive Šarḥ ʿUyūn al-masāʾil by al-Ḥākim Abū Saʿd al-Muḥassin b. Muḥammad b. Kurrāma al-Bayhaqī al-Barawġanī al-Ǧušamī/Češumī (d. 494/1101), while the second renders two passages taken from the Nubūwāt of the Muġnī. In several instances, these quotations will help to lay bare mistakes in the printed edition.