The passage introduced by the phrase (Sifre 161) = "an anonymous Sifre," likewise echoes Rabbi Ishmael's views; and the same is true of Sifre 21 as compared with Sifre 7. The beginning of Sifre 7 appears to be, strangely enough, an anonymous "halakha" expressing the opposite opinion, though this also may at need be harmonized with Rabbi Ishmael's view. Sifre 39 likewise follows Rabbi Ishmael's view, according to Hullin 49a. These and other less cogent reasons seem to indicate that the Sifre to Numbers originated in Rabbi Ishmael's school, although this does not exclude the assumption that the editor in addition borrowed much from Shimon bar Yochai's midrash and other less-known midrashim.