A Sliding Scale Built into the Law

Metzora's purification offerings include an explicit accommodation for poverty: a person healed of tzaraat who cannot afford the standard offering of two lambs may instead bring one lamb together with a much cheaper offering of flour and oil, or, if still unable, substitute birds throughout (Leviticus 14:21-22). The same sliding-scale principle appears elsewhere in Leviticus for other offerings, a sin offering scaled between a lamb, two turtledoves, or a portion of flour according to what the offerer can afford (Leviticus 5:7-11), and commentators read the recurrence of this structure as evidence of a deliberate legal principle rather than an isolated exception, that ritual obligation should not be set at a level only the wealthy could meet.

Source critics attribute Metzora's legislation, like the parallel material in Tazria, to the Priestly source, and note that the purification rite's combination of cedar wood, scarlet thread, hyssop and a live bird released after contact with a slaughtered bird's blood is unique among the Torah's ritual procedures for its symbolic enactment of restored life, a pattern some historians of religion compare loosely to purification rites elsewhere in the ancient world that dramatise the removal of a polluted state through a released or discarded living creature.