Leviticus 5:11 "He shall put no oil upon it"

Different types of sacrifices are brought when a person does Teshuvah after having committed a sin.

The sacrifice he must bring depends on the sin committed.

This Negative Mitzvah applies to an offering brought by a person who wishes to do Teshuvah for a sin. Therefore, it is often called a "guilt-offering" (see Positive Mitzvah 72).

Generally, a meal-offering consists of a mixture of wheat flour and olive oil.

Oil is considered a fine liquid, complimenting the flour in this delicate dough.

However, this meal-offering is being brought because the person is asking forgiveness for a sin. Therefore, no oil is mixed with the flour and it is left plain. No oil may be placed in this type of meal-offering.