All euphemisms for vows are equivalent to vows...(m.Nedarim 1:1)
If he said "[May it be to me] like the lamb [offering], Like the [Temple]
sheds," "Like the wood," "Like the fire," "Like the alter," "Like the
sanctuary," "Like Jerusalem."--
If he vowed by the name of one of any of the utensils used for the alter,
Even though he has not used the word korban--
lo, this one has vowed by korban.
Rabbi Judah says, "He who says, "Jerusalem," has said nothing [that is a
16 Woe to you, blind guides, who say, Whoever swears by the Temple, is not
obligated: but he that swears by the gold of the Temple, is obligated.
17 Fools and blind! Which is greater, the gold, or the Temple that sanctifies
18 And Whoever swears by the altar, is not obligated, but he that swears by the
gift that is upon it, is obligated.
19 O blind! Which is greater, the gift: or the altar that sanctifies the gift?
20 He that swears by the altar, swears by it, and by all things thereon.
21 And he that swears by the Temple, swears by it, and by that which abides
22 And he that has sworn by heaven, swears by the throne of Elohim, and by Him
that sits thereon.
The International Nazarene Beit Din says:
He who vows by a euphemism is bound by the euphemism as if by a vow whether the
euphemism is analogous or whether it is by a euphemism to that with is of
greater weight than that which is analogous.