Reference for Menachot 107:3

כמאן לימא רבי חנינא בן גמליאל היא ולא רבנן אפי' תימא רבנן נהי דחמץ גמור לא הוי נוקשה מיהא הוי

For we have learnt:<span class="x" onmousemove="('comment',' Ter. X, 2.');">¹</span> If an apple [of terumah] was chopped up and put into dough so that it leavened it, the dough is forbidden.<span class="x" onmousemove="('comment',' To be eaten by any but a priest, since the dough which was hullin and not terumah was leavened by an apple which was of terumah.');">²</span>

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