Reference for Shevuot 34:8
זו היא מצות עשה שבמקדש שאין חייבין עליה וכו': היכא קאי דקאמר זו היא התם קאי אין חייבין על עשה ועל לא תעשה שבמקדש
or negative<span class="x" onmousemove="('comment',' Lev. XII, 4: And into the sanctuary she shall not come (a woman after childbirth, till after 40 days for a male, and 80 days for a female) . huk, oat');"><sup>14</sup></span> precept [concerning uncleanness] in the Temple; and they [individuals] do not bring a suspensive guilt offering for [a doubtful sin<span class="x" onmousemove="('comment',' A suspensive guilt offering, , is brought by a person who is in doubt whether he has committed an act which, if done wilfully, is punishable by kareth, and if done wittingly, is punishable by the bringing of a sin offering; v. Lev. V, 17-19; and Rashi on verse 17; Hor. 8b.');"><sup>15</sup></span> in connection with] the positive or negative precept [concerning uncleanness] in the Temple;<span class="x" onmousemove="('comment',' Because a sliding scale sacrifice, and not a fixed offering, is brought for actual unwitting transgression,');"><sup>16</sup></span>