Shemini, Sh'mini, or Shmini (Hebrew: שְּׁמִינִי, "eighth"; third word overall and the first distinctive word in the parashah) is the 26th weekly Torah portion (פָּרָשָׁה‎, parashah) in the annual Jewish cycle of Torah reading and the third in the Book of Leviticus. Parashat Shemini tells of the consecration of the Tabernacle, the deaths of Nadab and Abihu, and the dietary laws of kashrut (כַּשְׁרוּת‎). The parashah constitutes Leviticus 9:1–11:47. It is made up of 4,670 Hebrew letters, 1,238 Hebrew words, 91 verses, and 157 lines in a Torah Scroll (סֵפֶר תּוֹרָה‎, Sefer Torah).

Jews read it on the 25th or 26th Sabbath after Simchat Torah, in late March or April. In years when the first day of Passover falls on a Sabbath (as it did in 2018 and 2019), Israeli and Reform Jews read the parashah following Passover, one week before Conservative and Orthodox Jews in the Diaspora. Israeli and all Reform Jews celebrate Passover for seven days, thus reading the next parashah (i.e., Shemini) on the Sabbath one week after the first day of Passover; Conservative and Orthodox Jews in the Diaspora celebrate Passover for eight days and read the next parashah (i.e., Shemini) one week later. In such years (for example, 2018), the two calendars realign when Conservative and Orthodox Jews in the Diaspora read Behar together with Bechukotai, while Israeli and Reform Jews read them separately.

In traditional Sabbath Torah reading, the parashah is divided into seven readings, or aliyot (עליות‎).

On the eighth day of the ceremony to ordain the priests and consecrate the Tabernacle, Moses instructed Aaron to assemble calves, rams, a goat, a lamb, an ox, and a meal offering as sacrifices (קָרְבֳּנוֹת‎, korbanot) to God, saying: "Today the Lord will appear to you." They brought the sacrifices to the front of the Tent of Meeting, and the Israelites assembled there. Aaron began offering the sacrifices as Moses had commanded.

In the second reading, Aaron concludes the offering of the sacrifices as Moses had commanded. Aaron lifted his hands toward the people and blessed them. Moses and Aaron then went inside the Tent of Meeting, and when they came out, they blessed the people again. Then the Presence of the Lord appeared to all the people.

In the third reading, fire came forth and consumed the sacrifices on the altar, and the people shouted and fell on their faces. Acting on their own, Aaron's sons Nadab and Abihu each took his fire pan, laid incense on it, and offered alien fire (אֵשׁ זָרָה‎, eish zarah), which God had not commanded. And God sent fire to consume them, and they died. Moses told Aaron, "This is what the Lord meant when He said: 'Through those near to Me I show Myself holy, and gain glory before all the people,'" and Aaron remained silent. Moses called Aaron's cousins Mishael and Elzaphan to carry away Nadab's and Abihu's bodies to a place outside the camp. Moses instructed Aaron and his sons Eleazar and Ithamar not to mourn Nadab and Abihu by rending their garments or leaving their hair unshorn and not to go outside the Tent of Meeting. And God told Aaron that he and his sons must not drink wine or other intoxicants when they entered the Tent of Meeting, so as to distinguish between the sacred and the profane.

In the fourth reading, Moses directed Aaron, Eleazar, and Ithamar to eat the remaining meal offering beside the altar, designating it most holy and the priests' due. And Moses told them that their families could eat the breast of the elevation offering and the thigh of the gift offering in any clean place.

In the fifth reading, Moses inquired about the goat of purification offering and was angry with Eleazar and Ithamar when he learned that it had already been burned and not eaten in the sacred area. Aaron answered Moses: "See, this day they brought their purification offering and their burnt offering before the Lord, and such things have befallen me! Had I eaten purification offering today, would the Lord have approved?" And when Moses heard this, he approved.