Positive commandment · Mitzvat Aseh #77 of 613
Commandment of a metzora when he is healed from his tzara’at
להקריב המצורע קרבן אחר שיטהר
The verse · Vayikra 14:10
וּבַיּוֹם הַשְּׁמִינִי יִקַּח שְׁנֵי־כְבָשִׂים תְּמִימִם וְכַבְשָׂה אַחַת בַּת־שְׁנָתָהּ תְּמִימָה וּשְׁלֹשָׁה עֶשְׂרֹנִים סֹלֶת מִנְחָה בְּלוּלָה בַשֶּׁמֶן וְלֹג אֶחָד שָׁמֶן
“And on the eighth day he shall take two he lambs without blemish, and one ewe lamb of the first year without blemish, and three tenth measures of fine flour for a meal offering, mingled with oil, and one log of oil.”
The Rambam’s words
For a person afflicted with tzara’at to offer a sacrifice after he becomes purified, as [Leviticus 14:1] states: "On the eighth day, he shall take...."
להקריב המצורע קרבן אחר שיטהר, שנאמר: "וביום השמיני ייקח" (ויקרא יד,י).
Why · Sefer HaChinuch #176
Commandment of a metzora when he is healed from his tzara’at
“From the roots of the commandment are what you will see at the end of my words. However, I am afraid of drawing close to the Dwelling of G-d, as I know that “anyone who comes close, who comes close” that has not sufficiently sanctified himself “will not see the House and live.””
Who & when
“And [it] is practiced at the time of the [Temple] by males and females.”
Where in the Mishneh Torah
Hilchot Offerings for Those with Incomplete Atonement הלכות מחוסרי כפרה