Reference for Yevamot 45:8

ורבי יוסי בר' יהודה חד בשפחה וחד בעובדת כוכבים וצריכי דאי אשמעינן שפחה משום דאין לה חייס אבל עובדת כוכבים דאית לה חייס אימא לא

but not In that of a slave who is [in some respects] attached to the observance of the commandments.<span class="x" onmousemove="('comment',' A slave must observe certain commandments. V. Hag. 40. ');">²¹</span> Hence both were required. With reference to the Rabbis, we have discovered [the reason for the exclusion of a] slave; whence do they derive [the exclusion of the] heathen? And should you suggest that we might derive it by inference from the slave, those<span class="x" onmousemove="('comment',' The texts speaking of the slave and the heathen, supra. ');">²²</span>

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