Reference for Yevamot 108:21

ודודתו דפשיטא ליה לתנא דמן האב ולא מן האם מנא ליה

implying<span class="x" onmousemove="('comment',' By the repetition. ');">⁵⁰</span> whether paternal or maternal, and Thou shalt not uncover the nakedness of thy mother's sister,<span class="x" onmousemove="('comment',' Ibid. 13. ');">⁵¹</span> implying also whether paternal or maternal.

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