The papper offers an identification and reconstruction of Abū l-Ḥasan al-Ṣūrī’s “Kitāb fī bāb al-qibla” together with its anonymous Qaraite refutation (al-Naqḍ ʿalā l-Sāmira). Building on previous studies by A. Loewenstamm, A. Halkin, H. Pohl, and others, this paper will also provide new evidence from the Firkovitch collections (mainly ФIPK. СAM. III–IV, EBP.-APAБ. I–II, and APAБ.-EBP.) documenting the significant intellectual exchange between Qaraites and Samaritans in 5th/11th century Damascus and Jerusalem.
A written version is forthcoming in a volume of the Studia Samaritana series (Berlin: De Gruyter). A draft edition of both texts has been completed and will be published at a later stage.