Yosef Karo

“ Milk falls into a pot of meat: [let a non-Jew] taste the piece that the milk fell on. If it does not taste of milk, everything is permitted. If the piece does taste of milk, then that piece is forbidden. For us who don't rely on a non-Jew, we need sixty in the piece, and if there's not sixty then it's all forbidden. ”

“ We only say the rule of "the piece itself becomes just as forbidden as a neveila" by milk and meat, but not by other prohibitions, like an olive's bulk of forbidden fat that was absorbed by a piece of meat, and there isn't sixty times [the meat] to nullify [the fat] , and it becomes forbidden, and afterwards it was cooked with other meat we only require [the new total] to have sixty times the olive bulk of the fat, and if so, then even the [original] piece of meat itself returns to become permitted. ”

“ Everyone in the world has the practice of forbidding when [the drop] fell on the wall [of the pot] that is not opposite the sauce, But only when it fell on the same side that is not opposite the fire. But if it fell on the side opposite the fire, it is permitted, for the fire incinerates it and dries it up. And in such a case the pot is also permitted. [This is] only for a little thing, like a drop, but if a lot fell, one should not permit even if it fell opposite the fire, unless it is [permitted by being] against the sauce and by means of 60 times the amount. ”