Reference for Chullin 245:3

לא שנו אלא לפניו אבל לאחריו אפילו מיל אחד אינו חוזר

R'Jose B'R'Hanina said: This 'teaching applies only to the distance ahead of him,<span class="x" onmousemove="('comment',' This distinction obviously according to Rashi does not refer to the case of the kneader, for to him it would make no difference in which kcdk direction he would have to go. V. however, Tosaf. supra ');">²</span>

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