Halakhah su Levitico 5:11

He prohibited us from placing olive oil in the meal-offering of a sinner. And that is His, may He be exalted, saying, "he shall not place oil on it" (Leviticus 5:11). And if one placed [it], he is lashed. (See Parashat Vayikra; Mishneh Torah, Sacrificial Procedure 12.)

And it is written about impurity of the Temple and its consecrated foods (Leviticus 5:2), "Or a soul that touches anything impure, etc. and it was hidden from him"; and it is stated about it all at the end of the matter (Leviticus 5:6), "And he shall bring his guilt-offering." And the verse does not come explicitly that the liability of the impure one there would be with his entering the Temple or with his eating consecrated meat. Rather, we have understood from the tradition that it speaks about this (Shevuot 6b). And even though the thing is from the tradition, we have found the liability for excision for one who ate consecrated [food] or entered the Temple explicit in another place, as it is stated (Leviticus 7:20), "And the soul that eats meat from the sacrifice of the peace-offering that is to the Lord and his impurity is upon him, he shall be excised"; and another verse (Numbers 19:20) states about the impure one that enters the Temple, "for the Temple of the Lord he has made impure, and he shall be excised." And once excision has been written about its volitional transgression, there is a sacrifice for its inadvertent transgression - with our rule, that everything that is with excision for its volitional transgression, is with a sin-offering for its inadvertent transgression. And it is written about an oath of expression (Leviticus 5:4-6), "Or if a soul swears to express with his lips, etc. and it was hidden from him, etc. And he shall bring his guilt-offering." And from where [do we know] that the liability there [for them] is with a sacrifice that varies up and down? As it is written in the section (Leviticus 5:11), "And if his hand does not reach, etc."

To not place olive oil in the meal-offering of a sinner: That a priest not place oil in the meal-offering of a poor sinner, as it is stated (Leviticus 5:11), "he shall not place oil on it" - and even though they would put oil on other meal-offerings. And I said, "the meal-offering of a poor sinner," because of [the following] - since a rich sinner never brings a meal-offering of flour, but rather a sacrifice of a beast, as is explicit in the Torah.