how a person may be certified as a ne'eman (one who is deemed trustworthy with respect to tithing), or as a ḥaver who is also trusted on matters of purity; and the duty of merchants regarding tithing demai produce. Chapter 3 considers the rules for giving or leaving demai for other people to use and specifies that a haver must not cause others to consume demai. Chapter 4 considers the rules of eating demai produce with people who are not trustworthy, and when buying it from them is allowed. Chapter 5 examines the rules about tithing demai produce bought from several people, and about tithing produce of one kind for produce of another kind. Chapter 6 examines the rules of tithing produce of rented or leased land or trees, of tithing the produce of partners and heirs, of produce sold in lands bordering the Land of Israel, and of produce bought for an am ha'aretz. Chapter 7 considers the rules for the tithing of food consumed with an am ha'aretz, rules of tithing by 'designation', and the rules concerning mixtures and regulations for the tithing of demai on urgent occasions. Commentaries Commentaries on this tractate include the following: The Rash Sirilio is the earliest known comprehensive commentary on a large portion of the Jerusalem Talmud is that of Rabbi Shlomo Sirilio (1485–1558). In the Vilna edition of the Jerusalem Talmud it appears only for tractates Berakhot and Pe'ah; but the commentary for the entire Seder Zeraim, including tractate Demai, appears in the Mutzal Mi'Eish edition of the Jerusalem Talmud. In addition to his commentary, Rash Sirilio worked to remove mistakes made by manuscript copyists that over time had slipped into the text of the Jerusalem Talmud and his amended text of the Gemara is reproduced alongside his commentary in the Vilna and Mutzal Mi'Eish editions of the Jerusalem Talmud. Mahara Fulda and its companion, Tosefot Maharaf, are the commentaries of Rabbi Eliyahu of Fulda, published in Amsterdam in 1710. Many later commentators refer to him only as HaMefareish (The Commentator). Pnei Moshe, the only commentary that covers all of the Jerusalem Talmud completely was written by Rabbi Moshe Margolies, where it was first published in Amsterdam in 1775. The Vilna Gaon also worked to correct many of the textual errors in the text of the Jerusalem Talmud and his rectifications are contained in marginal glosses published under the title Hagahot