Reference for Chullin 204:24

את"ל סבר רבי מחשבת אוכלין שמה מחשבה חישב לאוכלה אבר אבר ואכלה כולה חייב

Raba also said: If you can find authority for saying that R'Eleazar son of R'Simeon holds, an intention with regard to foodstuffs is of consequence, then if a person intended to eat the bird<span class="x" onmousemove="('comment',' I.e., a bird the whole of which was not as large as an olive's bulk.');"><sup>14</sup></span>