Reference for Yevamot 154:8

אמר רב יוסף היינו דשמענא ליה לרב יהודה דאמר עמיו מעמיו ולא ידענא מאי קאמר

But [it may be objected that the case] of an Egyptian of the second generation who married an Egyptian woman of the second generation is different since his cohabitation constitutes no transgression? — An Ammonite who married the daughter of an Israelite might prove it,<span class="x" onmousemove="('comment',' His daughter is eligible though his marriage constitutes a transgression. ');">¹⁴</span> and thus the argument would go round etc.<span class="x" onmousemove="('comment',' Continued as supra 77a. ');">¹⁵</span>

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