רֵאשִׁית֙ עֲרִסֹ֣תֵכֶ֔ם חַלָּ֖ה תָּרִ֣ימוּ תְרוּמָ֑ה כִּתְרוּמַ֣ת גֹּ֔רֶן כֵּ֖ן תָּרִ֥ימוּ אֹתָֽהּ׃
너희의 처음 익은 곡식 가루 떡을 거제로 타작 마당의 거제 같이 들어 드리라
Mishnah Eduyot
Shammai says: “[Dough] of a kav or more is subject to the law of hallah.” And Hillel says: “Of two kavs or more.” But the Sages say: “Neither according to the opinion of this one nor according to the opinion of this one, but [dough of] a kav and a half is subject to the law of hallah.” And after they increased the measures they said: “[Dough of] five quarters is subject. Rabbi Yose said: “Five are exempt, five and more are liable.”
Devash LeFi
8 Challah Our rabbis, may their memory be blessed, said (Vayikra Rabba 15:6), "Anyone who fulfills the commandment of challah, it is as though he abolished idolatry." And the rabbi [author of] Korban Shabbat, p. 28b explained that He, may He be blessed, surely commanded about challah, "The first of your kneading-troughs, etc." (Numbers 15:20); and likewise the priestly tithe and the first fruits, because He, may He be blessed, is the First, so as to negate those who err that the world was pre-existing. And hence, one who fulfills the commandment of challah to show that He, may He be blessed, pre-existed [the world] abolishes idolatry. And there, he cited the rabbi [author] of Torat Chaim on the chapter [entitled] Chelek, that this is the reason that we recite the blessing [on bread] over [the portion] where it got baked first. And that is why Rav Ashi asked, "How do they worship idolatry?" See the statement in the Talmud there at length.