Sifra (Aramaic: סִפְרָא) is the Halakhic midrash to the Book of Leviticus. It is frequently quoted in the Talmud, and the study of it followed that of the Mishnah. Like Leviticus itself, the midrash is occasionally called "Torat Kohanim", and in two passages also "Sifra debei Rav". According to Leḳaḥ Ṭob this latter title was applied originally to the third book of the Pentateuch because Leviticus was the first book studied in the elementary school, and it was subsequently extended to the midrash; but this explanation is contradicted by analogous expressions such as "Sifre debei Rav" and, in a broader sense, "ketubot debei Rav" and "teḳi'ata debei Rav".