Reference for Pesachim 178:8

מאי ולא עוד לא מיבעיא קאמר לא מיבעיא פסח דמצי אמרי ליה כי קבלינך לתקוני זביחה אלא אפילו סיבולת נמי דצוותא בעלמא הוא רשאין לומר לו טול חלקך וצא

In the case of Passover-offerings it goes without saying, for they can say to him, 'We accepted you for the purpose of the sacrifice.' But even in the case of a meal in common, which is mere companionship, they are at liberty to say to him, 'Take your portion and go. Others state: That is no problem to us,<span class="x" onmousemove="('comment',' That the quick-handed companion may be told to take his portion and go.');">¹⁴</span>

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