(Also Torat Kohanim.) The halakhic midrash on the book of Vayikra (Leviticus), organizing tannaitic commentary according to the order of Vayikra. The name “Sifra,” Aramaic for “book,” was first used to refer to this work in the Gaonic period, ca. 600–1000, and was probably compiled about the end of the fourth century c.e., Palestine.