Commentary for Kiddushin 113:5
מה מכשיר ומכפר האמור בפנים עשה בו מכשיר כמכפר אף מכשיר ומכפר האמור בחוץ עשה בו מכשיר כמכפר
It was stated: From what time are a leper's birds forbidden?<span class="x" onmousemove="('comment',' That no benefit may be derived from them.');"><sup>13</sup></span> R'Johanan maintained: From the time of slaughter;<span class="x" onmousemove="('comment',' Then the slaughtered one becomes forbidden, while the other (v. Lev, XIV, 7) , is likewise forbidden from then until it is actually freed. - Tosaf.');"><sup>14</sup></span> Resh Lakish said: From the time they are taken.<span class="x" onmousemove="('comment',' I.e., set aside for that purpose. On the bird that is freed v. preceding note');"><sup>15</sup></span>
Daf Shevui to Kiddushin
When it comes to the leper’s mitzvoth, inside the Temple there is a mitzvah that enables—his guilt-offering, which allows him to eat sacrifices. Other sacrifices offered in the Temple atone. Outside the Temple, the leper’s bird offerings enable him to enter the camp. And there are other mitzvoth that atone that are performed outside the Temple, namely the breaking of the heifer’s neck. Just as in the first case, the mitzvah that enables is like the mitzvoth that atones, so too with mitzvoth outside the Temple, those that enable are equivalent to those that atone. Just as one may not derive benefit from the heifer whose neck is broken, so too one may not derive benefit from the leper’s bird offerings.
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