מכשרין

(1) Any liquid which is desirable at the start achieves BeKhi Yutan [a state where liquid put upon food makes it susceptible to impurity] even if it is not desirable at the end; similarly [BeKhi Yutan is achieved if the liquid] is desirable at the end even if it is not desirable at the start. Impure liquids transfer impurity [whether their presence] is desirable or is not desirable.

(2) [If] a jar full of fruit is put into liquid, or [a jar] full of liquid is put into fruit and it [the fruit] absorbs [moisture] whatever it absorbs achieves BeKhi Yutan. What liquids did they [the Sages] refer to? Water, and wine and vinegar. And all other liquids are pure [they do not make food susceptible to impurity]. Rabbi Nechemiah deemed legumes [in the above scenarios] pure because legumes do not absorb [moisture].

(7) The following do not impart impurity and do not make [food] susceptible to impurity: Sweat, and pus, and excrement, and blood that comes out with these, and liquid [that comes out of a baby born in its] eighth [month]. Rabbi Yose says: Except for his blood. And [if] one drinks water from Tiberias even though it comes out clean. The blood [emerging from] slaughter of a non-kosher domestic animal, a non-kosher wild animal, or non-kosher birds, and blood of bloodletting for healing. Rabbi Elazar deems these impure. Rabbi Shimon ben Elazar says: The milk of a male is pure.