were required to cut their hair, and whose hair cutting was a religious duty: nazirites (as stated in ), those afflicted with skin disease (, metzora, as stated in ), and the Levites. Citing the Mishnah, the Gemara taught that if any of them cut their hair without a razor, or left behind two hairs, their act was invalid. A Master said in a Baraita that the use of the thumb for service in and 17, 25, and 28 showed that every finger has its own unique purpose. and provided that people of lesser means could bring less-expensive offerings. The Mishnah taught that one who sacrificed much and one who sacrificed little attained equal merit, so long as they directed their hearts to Heaven. Rabbi Zera taught that provided a Scriptural proof for this when it says, "Sweet is the sleep of a serving man, whether he eat little or much." Rav Adda bar Ahavah taught that provided a Scriptural proof for this when it says, "When goods increase, they are increased who eat them; and what advantage is there to the owner thereof." Rabbi Simeon ben Azzai taught that Scripture says of a large ox, "An offering made by fire of a sweet savor"; of a small bird, "An offering made by fire of a sweet savor"; and of a meal-offering, "An offering made by fire of a sweet savor." Rabbi Simeon ben Azzai thus taught that Scripture uses the same expression each time to teach that it is the same whether people offered much or little, so long as they directed their hearts to Heaven. And Rabbi Isaac asked why the meal-offering was distinguished in that uses the word "soul" (, nefesh) to refer to the donor of a meal-offering, instead of the usual "man" (, adam, in or , ish, in ) used in connection with other sacrifices. Rabbi Isaac taught that uses the word "soul" (, nefesh) because God noted that the one who usually brought a meal-offering was a poor man, and God accounted it as if the poor man had offered his own soul. The Sifra noted that says both, "if he be poor," and "his means do not suffice." The Sifra explained that reading "if he be poor," one might think that the verse allowed a less expensive offering for one who was relatively poorer that earlier, as in the case of one