* Makkot 9a, Sanhedrin 74b, The Noachid is free from punishment if he commits a sin unwittingly; ignorance of the Law, however, does not excuse him. If he commits a sin under duress, even one for which an Israelite is obliged to undergo martyrdom rather than transgress (e.g., idolatry, adultery, or murder), he is not liable to punishment.
* Makkot 9b, discusses why non-Jews are liable for the death penalty upon committing a capital crime, even if they are not exposed to Torah
* Chullin 13b, Rabbi Yochanan, who taught that 'the Gentiles outside the land (of Israel) are not idolaters; they are but continuing the customs of their ancestors'.
