מועד קטן י״ח א:ח׳
The Gemara asks: Is that so? But isn’t it taught in a baraita: Three things were said about nails: One who buries them in the ground is deemed righteous. One who burns them is even better, as he is considered pious. One who merely throws them away is regarded as wicked. The Gemara explains: What is the reason that it is prohibited to throw away nail clippings? This is prohibited lest a pregnant women pass over them and miscarry, for the Sages had a tradition that it is dangerous for a pregnant woman to walk over fingernails.
בן יהוידע על מועד קטן י״ח א:ב׳
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גליון הש"ס על מועד קטן י״ח א:א׳
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סנהדרין נ״ט א:ט״ו
It is further stated in the baraita that a mitzva that was stated with regard to the descendants of Noah and was not repeated at Sinai was stated for the Jewish people and not for the descendants of Noah. The Gemara raises an objection: On the contrary, from the fact that it was not repeated at Sinai, clearly it can be derived that it was stated for the descendants of Noah and not for the Jewish people. The Gemara answers: There is nothing that is permitted to a Jew and forbidden to a gentile.
תוספות על סנהדרין נ״ט א:ט״ו:א׳
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באר הגולה, באר ב ד׳:י״ב
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