According to Martínez-Delgado 2010, p. 501, the stranger was an adversary who attacked his view, while Scherman 1982, p. 64 says that the stranger merely relayed what he remembered from ibn Naghrillah's plan to attack him. Martínez-Delgado, José (2010). "Ibn Janāḥ, Jonah (Abū ʾl-Walīd Marwān)". In Norman A. Stillman; et al. (eds.). Encyclopedia of Jews in the Islamic World. Vol. Two:D–I. Leiden and Boston: Brill. Scherman, Nosson (1982). The Rishonim (1. ed.). Brooklyn, N.Y.: Mesorah Publ. u.a. ISBN0-89906-452-3.
Bos et al. 2020, "Introduction". Bos, Gerrit; Käs, Fabian; Lübke, Mailyn; Mensching, Guido, eds. (2020). Marwān ibn Janāḥ, On the Nomenclature of Medicinal Drugs (Kitāb al-Talkhīṣ): Edition, Translation and Commentary, with Special Reference to the Ibero-Romance Terminology. Islamic History and Civilization, Volume 170. Brill. doi:10.1163/9789004413344.
Becker 1996, p. 277. Becker, Dan (1996). "Linguistic Rules and Definitions in Ibn Janāḥ's "Kitāb Al-Lumaʿ (Sefer Ha-Riqmah)" Copied from the Arab Grammarians". The Jewish Quarterly Review. 86 (3): 275–298. doi:10.2307/1454908. JSTOR1454908.
Becker 1996, p. 277. Becker, Dan (1996). "Linguistic Rules and Definitions in Ibn Janāḥ's "Kitāb Al-Lumaʿ (Sefer Ha-Riqmah)" Copied from the Arab Grammarians". The Jewish Quarterly Review. 86 (3): 275–298. doi:10.2307/1454908. JSTOR1454908.