Reference for Kiddushin 145:1

חד לכהנים וחד ללוים וחד לישראלים וחד למישרי ממזר בשתוקי וחד למישרי שתוקי בישראל קהל גרים לא איקרי קהל ורבי יהודה כהנים ולוים מחד קהל נפקי אייתר ליה לקהל גרים

one refers to priests, one to Levites, one to Israelites; one to permit a mamzer [to intermarry] with a shethuki;<span class="x" onmousemove="('comment',' Though the former is certainly unfit, while the latter is doubtful.');">¹</span> and one to permit a shethuki to [intermarry] with an Israelite.<span class="x" onmousemove="('comment',' Though the former is of doubtful fitness while the latter is certainly fit. The last two are deduced by translating as in the text infra.');">²</span>

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