Torah Talk: Metzora
(ב) זֹ֤את תִּֽהְיֶה֙ תּוֹרַ֣ת הַמְּצֹרָ֔ע בְּי֖וֹם טׇהֳרָת֑וֹ וְהוּבָ֖א אֶל־הַכֹּהֵֽן׃ (ג) וְיָצָא֙ הַכֹּהֵ֔ן אֶל־מִח֖וּץ לַֽמַּחֲנֶ֑ה וְרָאָה֙ הַכֹּהֵ֔ן וְהִנֵּ֛ה נִרְפָּ֥א נֶֽגַע־הַצָּרַ֖עַת מִן־הַצָּרֽוּעַ׃ (ד) וְצִוָּה֙ הַכֹּהֵ֔ן וְלָקַ֧ח לַמִּטַּהֵ֛ר שְׁתֵּֽי־צִפֳּרִ֥ים חַיּ֖וֹת טְהֹר֑וֹת וְעֵ֣ץ אֶ֔רֶז וּשְׁנִ֥י תוֹלַ֖עַת וְאֵזֹֽב׃ (ה) וְצִוָּה֙ הַכֹּהֵ֔ן וְשָׁחַ֖ט אֶת־הַצִּפּ֣וֹר הָאֶחָ֑ת אֶל־כְּלִי־חֶ֖רֶשׂ עַל־מַ֥יִם חַיִּֽים׃ (ו) אֶת־הַצִּפֹּ֤ר הַֽחַיָּה֙ יִקַּ֣ח אֹתָ֔הּ וְאֶת־עֵ֥ץ הָאֶ֛רֶז וְאֶת־שְׁנִ֥י הַתּוֹלַ֖עַת וְאֶת־הָאֵזֹ֑ב וְטָבַ֨ל אוֹתָ֜ם וְאֵ֣ת ׀ הַצִּפֹּ֣ר הַֽחַיָּ֗ה בְּדַם֙ הַצִּפֹּ֣ר הַשְּׁחֻטָ֔ה עַ֖ל הַמַּ֥יִם הַֽחַיִּֽים׃ (ז) וְהִזָּ֗ה עַ֧ל הַמִּטַּהֵ֛ר מִן־הַצָּרַ֖עַת שֶׁ֣בַע פְּעָמִ֑ים וְטִ֣הֲר֔וֹ וְשִׁלַּ֛ח אֶת־הַצִּפֹּ֥ר הַֽחַיָּ֖ה עַל־פְּנֵ֥י הַשָּׂדֶֽה׃
(2) This shall be the ritual for a leper*leper Heb. meṣora‘, a person afflicted with ṣara‘ath; see note at 13.3. at the time of being purified. When it has been reported*it has been reported Cf. note at 13.2. to the priest, (3) the priest shall go outside the camp. If the priest sees that the leper has been healed of the scaly affection, (4) the priest shall order two live pure birds, cedar wood, crimson stuff, and hyssop to be brought for the one to be purified. (5) The priest shall order one of the birds slaughtered over fresh water in an earthen vessel; (6) and he shall take the live bird, along with the cedar wood, the crimson stuff, and the hyssop, and dip them together with the live bird in the blood of the bird that was slaughtered over the fresh water. (7) He shall then sprinkle it seven times on the one to be purified of the eruption and effect the purification; and he shall set the live bird free in the open country.
על פני השדה. מקום שאין שם יישוב שלא תדבק הצרעת. וההזיה בשלשתן או באזוב לבדו כטומאת המת:
INTO THE OPEN FIELD. An uninhabited place so that the leprosy does not infect anyone. The sprinkling was done with all three. On the other hand, it might only have been done with the hyssop as in the case of one who has been made unclean by a corpse.
(ז) וְלֹא־יִזְבְּח֥וּ עוֹד֙ אֶת־זִבְחֵיהֶ֔ם לַשְּׂעִירִ֕ם אֲשֶׁ֛ר הֵ֥ם זֹנִ֖ים אַחֲרֵיהֶ֑ם חֻקַּ֥ת עוֹלָ֛ם תִּֽהְיֶה־זֹּ֥את לָהֶ֖ם לְדֹרֹתָֽם׃
(7) and that they may offer their sacrifices no more to the goat-demons after whom they stray. This shall be to them a law for all time, throughout the ages.

Tzaraʿat Purification: A Vestige of Demonic Exorcism, David Bar-Cohn

Nearly all cases of impurity in the Torah—including seminal emission, menstruation, postpartum blood, tzaraʿat, and corpse contamination—have been understood by some scholars as rooted in a belief in demons. Nevertheless, this does not mean that the Priestly authors accepted this worldview. Indeed, some scholars have argued that the Priestly and Holiness legislation may be recasting these rituals into a polemic against such a view ... For the Priestly legislators, impurity is indeed a destructive power that requires purging. Yet, it is not an independent demonic force but a nameless power under YHWH’s control.