In the synagogue the Torah is read aloud in a fixed annual cycle of fifty-four weekly portions (parashiyot), one each Shabbat morning, with certain adjacent portions doubled in ordinary years so the sequence fits the calendar. Each portion is named for a distinctive word near its opening and is paired with a haftarah, a reading from the Prophets. The cycle closes and restarts on Simchat Torah. Metzora ('The Afflicted One', Leviticus 14:1-15:33) sets out the rite for purifying a person healed of tzaraat, the treatment of affliction found in houses, and the laws of bodily discharges. In ordinary years it is joined to Tazria as a double portion.
The purification rite for one healed of tzaraat, involving two birds, one slaughtered and one released alive after being dipped in the first bird's blood mixed with cedar wood, scarlet thread and hyssop (Leviticus 14:4-7), is read by rabbinic commentary as symbolically enacting the reversal of the affliction, the released bird representing the restored freedom of one who had been confined outside the camp, and commentators note the same combination of cedar, scarlet and hyssop recurs in the Torah's ritual for the red heifer, suggesting a shared symbolic vocabulary for purification across otherwise distinct rites. The affliction that can appear in houses (Leviticus 14:33-53), requiring the priest to examine the structure itself and potentially order stones removed or the entire house demolished, is read by some classical commentators as confined to the land of Israel and tied to its unique sanctity, while others, including material in the midrash, read it homiletically as a providential means of exposing treasure hidden by a house's previous Amorite owners.