Reference for Zevachim 211:8

<br><br><big><strong>הדרן עלך טבול יום</strong></big><br><br>

but when the flesh is disintegrated they do not defile garments. Wherein do they disagree? - Said Raba: They disagree where it [the flesh] is completely charred.<span class="x" onmousemove="('comment',' It is then disintegrated, yet not ashes. According to R. Simeon, a person who comes to assist in the burning at this stage does not defile his garments, whereas in the opinion of the Rabbis he does.');">⁶</span>

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