Reference for Menachot 33:14

ולימא ה"ז פגול ור"מ היא תנא דברי הכל אתניוה פיגול בפסול מיחלף ליה הרי זה בדברי הכל לא מיחלף ליה:

A Tanna once recited before R'Isaac B'Abba: If he burnt the handful intending to eat the remainder [on the morrow], all hold it to be piggul. But surely this is a matter of dispute?<span class="x" onmousemove="('comment',' Between R. Meir and the Sages; and according to the latter it is not piggul since the intention was expressed during the service of half the mattir only.');">¹⁶</span>

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