One who purchases [grain] for seed or for [feeding] animals, flour for [tanning] hides, oil for a lamp or oil for greasing utensils is exempt from the demai [tithing obligation]. From Keziv and beyond is exempt from the demai [tithing obligation]. The challah of an am haaretz, produce mixed with terumah, that which is pur-chased with maaser sheni money and the remnants of minchah-offerings are exempt from the demai [tithing obligation]. Pleasant oil: Beis Shammai [consider it] liable [to the demai tithing obligation]; but Beis Hillel exempt [it].

[Regarding] demai: We may make eruvin with it, and we may make shitufei [mevo’os] with it; we utter a blessing over it, and we recite the collective blessing [formula of the Bircas HaMazon] on it; we may separate [tithes from] it while unclothed [and] during twilight. But if one separates maaser sheni [from it] before maaser rishon, it is of no consequence. Oil which the weaver applies to his fingers is liable to the demai [tithing obliga-tion], but that which the carder puts in the wool is exempt from the demai [tithing obli-gation].

And these things are tithed [under the law of] demai in every location: pressed figs, dates, carobs, rice, and cumin. [Regarding] rice that is [from] Chutz La’aretz, whoever makes use of it is exempt [from the demai tithing obligation].

One who accepts upon himself to be trusted [with respect to tithes must] tithe what he eats, what he sells, and what he purchases, and may not be hosted by an am haaretz. R’ Yehudah says: Someone who is hosted by an am haaretz is also trusted. They said to him: [If] he is not trusted regarding himself, how can he be trusted regarding others?