Commentary for Kiddushin 65:8
טעמא דבהן יושב ומהרהר הא לאו הכי לא
yet he did not rise up before me!' It also happened that Bar Kappara - others state, R'Ishmael son of R'Jose - was sitting in a bath-house, when R'Simeon B'Rabbi entered and passed by, yet he did not rise before him. Thereat he was offended and went and complained to his father.' I taught him two-thirds of a third of "The Law of Priests".'<span class="x" onmousemove="('comment',' . The Midrashic exposition of Leviticus, so called because many of its laws refer to priests. It was presumably divided into three sections, and he had taught him two-thirds of one of these. - The work is also known as the Sifra. [Albeck, Untersuchungen uber die ohbvf ,ru, halakischen Midraschim, p. 89, n. 1, however, questions this identification, but regards the as denoting the book of Leviticus itself.]');"><sup>12</sup></span>