Reference for Menachot 13:6
וכיון דקמץ ליה עבד ליה גומא כי מהדר לגוויה דמנא קא מהדר ליה מכי מהדר ליה מנח ליה אדפנא דמנא ומניד ליה ונפל ממילא דנעשה כמי שהחזירו הקוף
But surely when he took out the handful he left a hollow, so that when he puts it back again he puts it into the vessel, does he not? - He put it back on to the sides of the vessel and he then shook it so that it fell bac of its own into the vessel; and it is the same as though it were put back by a monkey.<span class="x" onmousemove="('comment',' I.e., it was put back into the vessel not directly by the act of man; it is therefore not hallowed. Cf. infra 100b.');"><sup>9</sup></span> R'Jeremiah said to R'Zera, Why not suggest that he put it back into a vessel which was upon the ground?<span class="x" onmousemove="('comment',' And that is the reason why it does not become hallowed.');"><sup>10</sup></span>