Reference for Zevachim 209:10

אלא לרבנן אי אית להו דתנא דבי רבי ישמעאל אפילו שעיר המשתלח אי לית ליה אפי' פרה ופרים מנלן

Surely we require, and after that he may come into the camp,<span class="x" onmousemove="('comment',' Lev. XIV, 8. 'After that' means after he washes his garments, which were unclean. This shews that Scripture speaks of one who is without (he cannot come in otherwise) , and only then does he defile his garments.');">⁹</span> which is absent.

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