Reference for Shabbat 263:20

האי שמיני מיבעי ליה למעוטי שביעי שביעי מבן שמנת ימים נפקא

Resh Lakish objected to R. Johanan: If so, those who lack atonement,<span class="x" onmousemove="('comment',' This is the technical designation of all unclean persons who must offer a sacrifice as part of their purification rites, viz., a zab and a zabah, a leper, and a woman after childbirth. ');">¹⁸</span>

Jastrow