Reference for Shevuot 34:5
א"ר אושעיא בעינא דאימא מילתא ומסתפינא מחבריא הנכנס לבית המנוגע דרך אחוריו ואפילו כולו חוץ מחוטמו טהור דכתיב (ויקרא יד, מו) והבא אל הבית דרך ביאה אסרה תורה
It has also been taught similarly: These roofs [of the Temple] - sacrifices of the highest grade of holiness may not be eaten there,<span class="x" onmousemove="('comment',' For they must be eaten within the Temple; and only the floor and air till the ceiling are holy, but not the attics and roofs.');"><sup>8</sup></span> and sacrifices of a minor grade of holiness may not be sacrificed there;<span class="x" onmousemove="('comment',' Though they may be eaten there, because, of course, they may be eaten anywhere within the walls of Jerusalem. According to Tosaf., ihdd however, they may not be eaten on the roof; but v. Pes. 85b, Rashi (s.v.) , and Adreth, Responsa, 34.');"><sup>9</sup></span> and an unclean person who entered the Temple by the roof is exempt, for it is said: And into the sanctuary she shall not come:<span class="x" onmousemove="('comment',' Lev. XII, 3; a woman after childbirth, till after 40 days for a male child, and 80 days for a female. Entering by the roof is not normal.');"><sup>10</sup></span>