[If] one gathered challah portions with the intention of not separating them, [if] one baked a flat cake on top of [another] flat cake [and they became stuck together] after they have formed a crust in the oven, froth of water that is not hollow, the second froth of split beans [porridge], the froth of old wine, and [froth] of oil always, and [froth] of lentils [porridge], R’ Yehudah says: The same applies to [froth] of grasspea [porridge]; they are tamei in regard to a tevul yom, and, it is needless to say, in regard to all other [sources of] tumah.

A nail-shaped [protrusion] on the back of the loaf, a small clump of salt, or a burnt crust that is less than a fingerbreadth — R’ Yose says: Whatever is eaten [together] with [the loaf], are tamei in regard to a tevul yom, and, it is needless to say, in regard to all other [sources of] tumah.

A pebble in the loaf, a large clump of salt, or a lupine, or a burnt crust that is greater than a fingerbreadth — R’ Yose says: Whatever is not eaten together with it is tahor in regard to an av hatumah, and, it is needless to say, in regard to a tevul yom.

Barley and spelt that are not peeled, tiah, asa- foetida, and alum — R’ Yehudah says: even black beans — are tahor in regard to an av hatumah and, it is needless to say, in regard to a tevul yom. [These are] the words of R’ Meir. But the Sages say: They are tahor in regard to a tevul yom, but are tamei in regard to all [other] sources of tumah. Barley and spelt that are peeled, and wheat, whether it was peeled or not peeled, ketzach, sesame, and pepper — R’ Yehudah says: even white beans — are tamei in regard to a tevul yom, and, it is needless to say, in regard to all [other] sources of tumah.