Midrash sur L’Exode 30:9

4) "with a young bullock for a sin-offering and a ram for a burnt-offering": I might think that in the place (the inner altar) where he applies the blood of the bullock, there he applies the blood of the ram. R. Yossi says (to show that this is not so): (It is written [Shemoth 30:9]) "You shall not bring up upon it (the inner altar) strange incense, nor burnt-offering nor meal-offering." Which burnt-offering must Scripture exclude (from the inner altar)? This is the ram for a burnt-offering (of Yom Kippur).

6) But then, how would I satisfy (Shemoth 30:9): "You shall not bring up upon it (the golden altar) strange incense nor burnt-offering"? — (I would understand it) as applying to offerings where it had not merited the application of their blood; but with offerings where it had merited the application of their blood, (I would say that) it should merit the smoking of their fats. It is, therefore, written (to negate this): "on the altar of the burnt-offering" — not on the inner altar.

8) R. Yossi says: I read "korban," and I might think an individual may donate (even) incense, and that he is bound by (Devarim 23:24): "What issues from your lips shall you observe and you shall do, and that he satisfies (Shemoth 30:9) "You shall not bring upon it (the altar) strange (i.e., donated) incense, nor burnt-offering" by not bringing it upon the inner altar, but he may bring it upon the outer altar (just as he does a burnt-offering) — it is, therefore, written (Shemoth 31:11): "and the spice incense for (smoking in the sanctuary, which is) holy" — spices are offered only within (i.e., in the sanctuary).