At the conclusion of the laws detailing the sliding-scale offering, which adjusts according to a person's financial ability, the focus shifts to the destitute individual who brings a simple flour offering. This offering atones for three specific transgressions: withholding testimony, defiling the Sanctuary and its holy items, and making a rash oath. While these offenses appear unrelated, they essentially represent a complete cycle of damaging the truth. Withholding testimony harms social and legal truth; defiling the Sanctuary violates the truth of moral freedom and purity; and a rash oath compromises the internal truth of thought and will. Even in the depths of poverty, an individual who brings a mere handful of flour, entirely lacking oil or frankincense, achieves complete atonement from God, and his offering is considered fully accepted and holy [רש״ר הירש, שטיינזלץ].
The laws account for the possibility that a person's financial situation might change after setting money aside for their atonement. If an individual initially possessed wealth and set aside funds for an animal, but subsequently fell into poverty, he may take a portion from those designated funds to purchase a less expensive bird offering. Conversely, if a destitute person set aside money for a flour offering and then became wealthy, he must add out of his own pocket to the original funds in order to bring the animal offering required of a wealthy person [רש״י, רד״צ הופמן, חומש קה״ת].
The three transgressions addressed here vary greatly in their severity. Defiling the Sanctuary is a grave offense that carries the severe penalty of spiritual excision if done intentionally. Withholding testimony is less severe but still carries liability for intentional violation, while a rash oath is the lightest of the three. It might be logical to assume that the type of offering required corresponds directly to the gravity of the offense, with an animal required for the most severe sin, a bird for the intermediate, and flour for the lightest. However, the requirement is based entirely on financial capacity, completely independent of the sin's severity. A wealthy person must bring an animal even for the lightest transgression, while a completely destitute person achieves full atonement with simple flour even for the most severe offense [רש״י, מזרחי, שפתי חכמים, ברכת אשר, גור אריה].
Once the handful of flour is burned on the altar, the remainder of the offering is given to the priests, functioning just like a standard voluntary meal offering. The priests eat this leftover flour, and their consumption actively participates in the sinner's atonement process [רשב״ם, חזקוני, העמק דבר, שטיינזלץ]. However, the primary approach among commentators addresses the unique scenario where the sinner bringing the offering is a priest himself. Generally, a priest's meal offering is completely burned and never eaten. To prevent a conflict with this general rule, the law clarifies that a sinning priest's offering is treated like his voluntary offering; it is entirely consumed by the altar's fire and not eaten by anyone [רש״י, רלב״ג, מלבי״ם]. Furthermore, this comparison to a voluntary offering indicates that a priest who sins is permitted, if he so chooses, to personally perform the sacrificial service for his own obligatory offering [תורה תמימה].