Reference for Bekhorot 57:35

אם היה כהן מטמאהו מתרומתו כו':

or filling the waters, whereas in the case [of the Mishnah] it is payment for actual sprinkling or sanctification.<span class="x" onmousemove="('comment',' This being part of the preparation for the performance of the precept for which there is no reward.');">²²</span>

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