['The Sages stated a significant principle with regard to the halakhot of Shabbat: One who forgets the essence of Shabbat, i.e., one who is entirely ignorant of the mitzva of Shabbat according to Torah law, and performed numerous prohibited labors on multiple Shabbatot, is liable to bring only one sin-offering for all those labors when he becomes aware that those actions were prohibited. One who knows the essence of Shabbat but forgets which day is Shabbat, i.e., one who lost track of the days of the week, and performs numerous prohibited labors on multiple Shabbatot is liable to bring a sin-offering for each Shabbat when he becomes aware that he performed those actions on Shabbat. One who is aware that the day is Shabbat but temporarily forgot that certain labors were prohibited and performed numerous prohibited labors on multiple Shabbatot is liable to bring a sin-offering for each and every primary category of labor that he performed. One who performs numerous prohibited labors subsumed under a single category of labor is liable to bring only one sin-offering.', 'This fundamental mishna enumerates those who perform the primary categories of labor prohibited on Shabbat, which number forty-less-one. They are grouped in accordance with their function: One who sows, and one who plows, and one who reaps, and one who gathers sheaves into a pile, and one who threshes, removing the kernel from the husk, and one who winnows threshed grain in the wind, and one who selects the inedible waste from the edible, and one who grinds, and one who sifts the flour in a sieve, and one who kneads dough, and one who bakes. Additional primary categories of prohibited labor are the following: One who shears wool, and one who whitens it, and one who combs the fleece and straightens it, and one who dyes it, and one who spins the wool, and one who stretches the threads of the warp in the loom, and one who constructs two meshes, tying the threads of the warp to the base of the loom, and one who weaves two threads, and one who severs two threads for constructive purposes, and one who ties a knot, and one who unties a knot, and one who sews two stitches with a needle, as well as one who tears a fabric in order to sew two stitches. One who traps a deer, or any living creature, and one who slaughters it, and one who flays it, and one who salts its hide, a step in the tanning process, and one who tans its hide, and one who smooths it, removing hairs and veins, and one who cuts it into measured parts. One who writes two letters and one who erases in order to write two letters. One who builds a structure, and one who dismantles it, one who extinguishes a fire, and one who kindles a fire. One who strikes a blow with a hammer to complete the production process of a vessel (Rabbeinu Ḥananel), and one who carries out an object from domain to domain. All these are primary categories of labor, and they number forty-less-one.', 'And they stated an additional principle with regard to the halakhot of Shabbat. Anything fit to store, in the sense that it is large enough to make it worthwhile to store for future use, and people typically store items like it, and one carried it out into a prohibited domain on Shabbat, he is liable to bring a sin-offering for that action. And anything not fit to store and people typically do not store items like it, since it is too insignificant to warrant storage, and one carried it out on Shabbat, only the one who stores it is liable. By storing the item, one indicates that the item is significant to him, even though it is not significant for the typical person. Therefore, he alone is liable for carrying it out into a prohibited domain.', 'The mishna lists the measures in which various substances are significant and generally stored. One who carries out straw in a measure equivalent to a cow’s mouthful is liable. The measure that determines liability for etza is equivalent to a camel’s mouthful. Because it is a coarser food, he must carry out a greater amount in order to be liable. The measure that determines liability for ears of grain is equivalent to a lamb’s mouthful. The measure that determines liability for grass is equivalent to a goat’s mouthful, which is smaller than that of a lamb. The measure that determines liability for garlic leaves and onion leaves, if they are moist and fit for human consumption, is equivalent to a dried fig-bulk. A dried fig-bulk is the standard measure for human food. If the garlic leaves and onion leaves are dry, the measure for liability is equivalent to a goat’s mouthful. And none of these substances join together with one another to constitute a measure for liability because they are not equal in their measures. One who carries out a measure of foods fit for human consumption equivalent to a dried fig-bulk into a domain where carrying is prohibited on Shabbat is liable. And all those foods join together with one another to constitute that amount because they are equal in their measures. This amount is calculated without their shells, and their seeds, and their stems, and their bran, the husk that comes off of the wheat kernel when pounded, and their coarse bran that remains in the flour. Rabbi Yehuda says: None of the shells are calculated, except for the shells of lentils, which join together with the lentils to comprise the measure for liability because they are cooked and eaten with them.']