Reference for Chullin 50:36

דתניא

It is neither R'Judah nor the Rabbis! For we have learnt: If a man made Tamad putting in a certain measure of water, and he subsequently found the same measure of liquid, he is exempt from tithing it.<span class="x" onmousemove="('comment',' For it is regarded as water, even though its taste may be that of wine, since there is here no increase in the mixture. V. Ma'as. V, 6. It is assumed for the present that such considerations, as to whether the mixture has fermented or not, are of no consequence.');">²¹</span>

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