A Baheret [type of diseased patch that creates impurity] itself is [at minimum] like [the size of] a square Cilician bean. The area of a bean is nine lentils. The area of a lentil is [the area of] four hairs. Thirty-six hairs are [therefore] found [to make up a Baheret].

A Baheret like [the size of] a bean with a patch of healthy skin in it like [the size of] a lentil, [if] the Baheret spread, it is [still] impure. [If] it diminished, it becomes pure. [If] the healthy patch of skin spread, it is [still] impure. [If] it diminished, it becomes pure.

A Baheret like [the size of] a bean with a patch of healthy skin in it smaller than a lentil, [if] the Baheret spread, it becomes impure. [If] it diminished, it becomes pure. [If] the patch spread, it becomes impure. [If] it diminished, Rabbi Meir declares impure and the Sages declare pure because a Nega [diseased patch on skin, clothes, or houses that create impurity] cannot spread within itself.

A Baheret more than [the size of] a bean and within it is a patch of healthy skin more than [the size of] a lentil, [if] they grew or diminished, they are [still] impure, as long as they do not diminish to less than the [minimum] area.

A Baheret like [the size of] a bean with a patch of healthy skin like [the size of] a lentil surrounding it and outside of the patch is [another] Baheret, the inner [Nega] requires quarantine and the outer one is decided [to be impure]. Rabbi Yossi said: The patch is not a sign of impurity for the outer one [and so the outer one also requires quarantine]. [If the patch] diminished or went away, Rabban Gamliel says: If it was disappearing from the inside [edge], it is a sign of expansion for the inner [Nega and therefore it is impure] but the outer one is pure. But if it was from the outside [edge], the outer one is pure and the inner one requires quarantine. Rabbi Akiva says: In both cases [the inner Nega] is pure.

Rabbi Shimon said: When [is the law about the patch diminishing on the inner edge true]? When [the patch] is exactly [the area of] a lentil. If it was more than a lentil, the leftover [becomes] the expansion for the inner [Nega] and the outer one is [still] impure. [If instead of a healthy patch] it was a dull patch less than [the area of] a lentil, it is a sign of expansion for the inner [Nega if the inner edge diminished] but is not a sign of expansion for the outer one [if the outer edge diminished] .

There are twenty-four tips of limbs on man that do not become impure due to a healthy patch [seen in a Nega]: The tips of the fingers of the hands and feet [i.e. toes], the tips of the ears, the tip of the nose, the tip of the male organ, the tips of the breasts on a woman. Rabbi Yehuda says: Even on a man. Rabbi Eliezer says: Even warts and thin-necked warts do not become impure due to a healthy patch [in the Nega].

These are the places on man that do not become impure due to a Baheret: inside the eye, inside the ear, inside the nose, inside the mouth, the folds [of skin on body], the folds on the neck, under the breast, the armpit, the sole of the foot, the nail, the head, [the skin of] the beard, the boil and the burn and the blister that are unhealed; [these] do not make Negaim impure and do not combine [to make impure] in [other] Negaim and a Nega cannot expand into them and they are not made impure by a healthy patch of skin [in them] and they do not prevent a person who turned completely white [due to his Nega, from becoming pure]. If the head or beard returned and became bald [or if] the boils, the burns or the blister grew a scab, behold these can make Negaim impure but do not combine [to make impure] in [other] Negaim and a Nega cannot expand into them and they are not made impure by a healthy patch of skin [in them], but they do prevent a person who turned completely white [due to his Nega, from becoming pure]. The head or the beard [of someone] who has not yet grown hair [in them] and the thin-necked warts on the head or in the beard are judged as flesh of the body.