Reference for Yevamot 42:15

תנא ושייר מאי שייר דהאי שייר שייר שניות דבי רבי חייא

and these<span class="x" onmousemove="('comment',' The cases cited in the inquiry, which are a generation higher. ');">³⁵</span> were not enumerated among them!<span class="x" onmousemove="('comment',' Which seems to prove that these were not forbidden. ');">³⁸</span> — Some might have been mentioned and others omitted.<span class="x" onmousemove="('comment',' Lit., 'he taught and left over'; though the others might be equally forbidden. ');">³⁹</span>

Jastrow