The Food of Outsiders
20. Meat that is found in the possession of a non-Jew: one is permitted to derive benefit from it. [Meat found] in the possession of a heretic: one is prohibited from deriving benefit from it. [Meat] that comes out of a non-Jewish temple is the meat of sacrifices for the dead [and is prohibited]. Because they said that [meat] slaughtered by a heretic is idolatry, their bread is the bread of Samaritans, their wine is libation wine, their produce is [considered to be] fully untithed, their books are books of magic, and their children are mamzerim.
21. We do not sell to them, we do not purchase from them, and we do not do business with them; we do not teach their children a craft, and we are not healed by them—neither a monetary nor a spiritual healing.
Translated by Matthew Goldstone.
Published in: The Posen Library of Jewish Culture and Civilization, vol. 2: Emerging Judaism.