More on specified (and unspecified) funds that have been set aside by one undertaking nezirut. The funds that were going to the sin-offering cannot be accessed for anything else, including voluntary offerings. How do we know this detail with regard to the nazir? There's a dispute whether it's derived from a verse or if there's no need for that kind of explication. And then the question comes back the usability of the funds. Also, more on the process of swapping funds for the animal.