Reference for Yoma 15:14

לעולם לא מקיש וכהן השורף את הפרה מעלה בעלמא

nor anoint himself nor stand at a place of filth. I he happens to have an obligatory ritual bath, he should place reed grass on that part and thus bathe.<span class="x" onmousemove="('comment',' Lest he blot out 'the name of God.');">¹⁷</span>

Jastrow