Reference for Niddah 41:3

וכולן אין בודקין אותן אלא בכוס טבריא

as the Carmel wine in its natural undiluted state when it is new.<span class="x" onmousemove="('comment',' Lit., 'new and not old'. According to an interpretation of Maimonides and Semag (cf. Maharsha) the Sharon wine, when used in an examination of blood, must first be new and undiluted and then mixed expressly for the purpose of the examination with two parts of water. ');">³</span>

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