Reference for Chullin 66:10

אין ידים תחלות לחולין רבי שמעון בן אלעזר אומר משום רבי מאיר

- Rather, said R'Papa, here [in the Mishnah] we are dealing with hands that were unclean in the first degree, and the ruling is in accordance with the view of R'Simeon B'Eleazar.

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