Reference for Arakhin 45:22

ואלא הא דאמר אמימר

And R'Eleazar B'Simeon said: These are [respectively] the very views of Beth Shammai and Beth Hillel, for Beth Shammai holds: A consecration [to the Sanctuary] made In error is [valid] consecration, whilst Beth Hillel holds it is not valid consecration.

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