פירוש על עבודה זרה 54:6

Most scholars interpret Jacob of Kefar Sekaniah as being a student of Jesus. Jesus was often portrayed as having healing powers. Ben Dama wants to be healed, perhaps by some sort of incantation, which is often the way that Jesus heals. But R. Ishmael does not allow him to do so because of his heresy. This proves that the prohibition of being healed by a non-Jew is absolute.