Reference for Menachot 50:17

אלא אמר רב חסדא לא קשיא הא רבי אליעזר הא רבנן

signifying that [the unclean person who eats of] what has been rendered permitted to those that are clean is culpable on account of uncleanness, but [the unclean person who eats of] what has not been rendered permitted to those that are clean<span class="x" onmousemove="('comment',' I.e., flesh of an offering before the sprinkling of the blood.');">¹¹</span>

Jastrow