Chapter 7 of Tractate Chullin in the Mishnah, Tosefta, and Babylonian Talmud interpreted the laws of the prohibition of the sinew of the hip (the sciatic nerve, "gid ha-nasheh") in . The Mishnah taught that the prohibition against eating the sciatic nerve in is in force both within the Land of Israel and outside it, both during the existence of the Temple and after it, and with respect to both consecrated and unconsecrated animals. It applies to both domesticated and wild animals, and to both the right and the left hip. But it does not apply to birds, because they have no spoon-shaped hip as the muscles upon the hip bone (femur) of a bird lie flat and are not raised and convex like those of cattle. It also applies to a live fetus found in a slaughtered animal, although Rabbi Judah said that it does not apply to a fetus. And the live fetus' fat is permitted. Rabbi Meir taught that one should not trust butchers to remove the sciatic nerve, but the Sages taught that one may trust butchers to remove the sciatic nerve as well as the fat that and forbids.