Hallah (Hebrew: חלה, literally "Loaf"), although in the biblical sense that which refers to the "dough-offering," is the ninth tractate of Seder Zeraim ("Order of Seeds") of the Mishnah and of the Talmud, treating on one of the twenty-four sacerdotal gifts mentioned in the Hebrew Bible. During the period of the Jewish Temple, this "Hallah" was separated from bread made from either one of the five species of grain (wheat, barley, spelt, oats [var. goatgrass] and wild barley [var. rye]) and given unto a priest of Aaron's lineage (Kohen). Today, since the priests are no longer ritually clean, the "dough-portion" is separated and burnt in the oven, or fed to birds in a few Jewish communities. Before the Hallah is separated a blessing is said: "asher ḳiddeshanū bamitzvotau we'tzivanū le'hafrish challah." The amount separated is only from bread products made from at least 1.2 kilos of flour or more (without a blessing) or 1.666 kilos or more (with a blessing according to some authorities) or 2.25 kilos or more (with a blessing) and is the size of a large olive. If less than the requisite amount is used, some separate without a blessing while others do not separate at all. If no separation is done while cooking, it can be done afterwards without a blessing.