* Judah ha-Levi, "Cuzari," iii. 73, although only those laws which are found in the Torah, before the revelation at Sinai, should, it would seem, be binding upon all mankind, yet the Rabbis discarded some and, by hermeneutic rules or in accordance with some tradition, introduced others which are not found there.
* Teshuvot Chachmai Provance 48 which clearly distinguishes between regulations based on the Noachide laws and regulations based on the law of the land or the law of the king.
* Kesef Mishneh on Sanhedrin 57b, In the case of murder, if the Noachide slay a child in its mother's womb, or kill a person whose life is despaired of ("ṭerefah"), or if he cause the death of a person by starving him or by putting him before a lion so that he can not escape, or if he slay a man in self-defense, the Noachide is guilty of murder and must pay the death-penalty, although under the same circumstances an Israelite would not be executed
* Leḥem Mishneh & Kesef Mishneh on 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
* Sefer Haikarim 1:25. One finds although torah law and Noachide law differ in the details, the principles used are the same, since they derive from the same source. Moreover, the two systems exist concurrently: while Jews have torah law, the other peoples abide by the Noachide code.
==References in the Rishonim==
Rabbis of the early medieval period (1250–1550) preceding the Shulchan Aruch
* Yehudah haLevi, "Cuzari," iii. 73, although only those laws which are found in the Torah, before the revelation at Sinai, should, it would seem, be binding upon all mankind, yet the Rabbis discarded some and, by hermeneutic rules or in accordance with some tradition, introduced others which are not found there.
* Teshuvot Chachmai Provance 48 which clearly distinguishes between regulations based on the Noachide laws and regulations based on the law of the land or the law of the king.
* Sefer Haikarim 1:25. One finds although torah law and Noachide law differ in the details, the principles used are the same, since they derive from the same source. Moreover, the two systems exist concurrently: while Jews have torah law, the other peoples abide by the Noachide code.
* Tosefos, 'Avodah Zarah, 8(9?):4, enumeration of the seven Noachide laws
* Tosefos, Sanhedrin 8:1, He who observed the seven Noachian laws was regarded as one of the pious of the Gentiles, and was assured of a portion in the world to come.
