I am seeking any and all premodern responsa or other forms of legal writings that refer or allude in any way to Muhammad: e.g. reference to entering mosques, allusions to idolatry or false worship equating Muhammad’s role in Islam to Jesus’ role in Christianity, prophethood, prayer, conversion and forced conversion, etc. Anything and everything would be most welcome in any language.
I am familiar with the works of Maimonides in his Commentary on the Mishnah, Mishneh Torah, responsa and letters (such as to Obadiah the ger, Iggeret Hashemad, etc.).
I also found one short reference by Nissim b. Reuven Alfasi on Sanhedrin (חידושי הרן מסכת סנהדרין פרק ז - ארבע מיתות).]
That is all I have been able to find.
Modern or current responsa are not sought for this project.
I am also seeking references or allusions to Muhammad in the writings of Avraham ben HaRambam or others with similar interest (I am familiar with Bahya’s famous reference to a prophetic Hadith).