Reference for Keritot 29:26

איכא למיפרך

indicating that one is liable [to separate offerings] in the case of a sister who is at the same time his father's sister and his mother's sis Said R'Adda B'Ahaba: This<span class="x" onmousemove="('comment',' Viz., that a sister should be at the same time the father's sister and the mother's sister.');">¹⁵</span>

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