Reference for Pesachim 88:8

ור"ע טעם כעיקר מנא ליה יליף מבשר בחלב לאו טעמא בעלמא הוא ואסור הכא נמי לא שנא

For it was taught, R'Akiba said: If a nazirite soaked his bread in wine and ate as much as an olive of the bread<span class="x" onmousemove="('comment',' The wine had not soaked through the whole olive-bulk of the bread, so that part of the bread is by itself; and the only reason for culpability must be the principle enunciated by R. Johanan.');">⁹</span> and the wine [combined] he is culpable.

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