AC 3732 - "to vow a vow"

AC 3732
In the internal sense "to vow a vow" signifies
to will that the Lord shall provide,
is from the fact that in vows there is a the desire and affection
that what is willed may come to pass;
thus that the Lord shall provide.
There is also implied somewhat of a stipulation,
and at the same time somewhat of an obligation
on the part of a person,
which he takes upon himself
if he comes to possess the object of his wish...