Reference for Niddah 30:17

התם ודאי וודאי הוא כדרב חנינא חוזאה

and there is only the doubt as to whether or not it was tithed, and the doubt nevertheless sets aside the certainty? — No, there it is a case of a certainty against a certainty, in agreement with a statement of R. Hanina of Hozae,<span class="x" onmousemove="('comment',' A district on the eastern side of the Tigris. ');">¹⁶</span>

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