2,731. "Like the Meat of a Peace Offering"
Hilchos Nedarim 1:14
Let’s say that someone declares produce to be to him like something devoted to Heaven (charamim). In such a case, the thing is prohibited because things devoted to Heaven are designated for the upkeep of the Temple (bedek haBayis). If he declares produce to be “like the gifts for the chamber to me,” “like the daily offerings,” “like the storage rooms,” “like the wood,” “like the fire offerings,” “like the altar,” or like one of the altar tools, i.e., “like the rakes,” “like the jugs,” “like the forks,” etc. – in all of these cases, the produce is rendered prohibited even though he didn’t mention a particular sacrifice. The same is true if he says “to me like the Sanctuary” or “like Jerusalem.” This is because all of these things are comparable to saying, “to me like a sacrifice.”
Hilchos Nedarim 1:15
Let’s say that meat from a sacrifice was in front of someone and he said, “Produce is to me like this meat.” The produce is rendered prohibited. This is true even in the case of the meat of a peace offering whose blood has been thrown, which may be eaten by non-kohanim. This is because the intention of his vow was the inherent quality of the meat (i.e., before the blood was thrown), which was a state of prohibition. Regarding the meat of a firstborn animal, if the blood has not yet been thrown, the produce is rendered prohibited; if the blood has been thrown, the produce remains permitted.