משנה אויף במדבר 18:30

Unspecified vows are interpreted strictly, but if specified [they are interpreted] leniently. How so? If one says, “Behold! This is to me as salted meat”; or “As wine of libation” If he vowed by that which is to Heaven, his vow is valid. If by that which is idolatrous, his vow is invalid. And if it was unspecified, his vow is valid. [If he says], “Behold! This is to me as herem” If as a herem to Heaven, his vow is valid; If as a herem to the priests, his vow is invalid. If it was unspecified, his vow is valid. “Behold! This is to me as a tithe” If he vowed, as tithes of beasts, his vow is valid. If as grain tithes, his vow is invalid. If unspecified, his vow is valid. “Behold! This is to me as terumah” If he vowed, as the terumah of the Temple-chamber, his vow is valid. If as the terumah of the threshing-floor, his vow is invalid. If unspecified, his vow is valid. The words of Rabbi Meir. Rabbi Judah says: An unspecified reference to terumah in Judea is a valid vow, but not in Galilee, because the Galileans are unfamiliar with the terumah of the Temple-chamber. Unspecified references to haramim in Judea are not binding but in Galilee they are, because the Galileans are unfamiliar with priestly haramim.