Related for Shevuot 20:7
אמר עולא אמר רבי יוחנן תמידין שלא הוצרכו לצבור נפדין תמימים
If so, le the festival goats also atone for that for which the Day of Atonement goat atones, because once [in the year] is written in connection with the inner goat [and not the outer]. In reality, [the emphasis on] once does seem justified to him,<span class="x" onmousemove="('comment',' For, though it is written in connection with the inner goat, it has already been explained that the outer is equated with the inner (v. supra p. 2) . Hence, the latter half of the verse: with the blood of the sin offering of atonement once in the year shall he make atonement for it implies that the atonement of the sin offering (i.e., inner goat, and also outer goat, for it has been equated with it) is only once a year, i.e., the other goats (such as the festival goats) cannot make this atonement.');"><sup>9</sup></span>