“The man by an oath” — excluding one under duress.
A coerced oath or one prevented by force majeure (river, illness) is outside the normal shevu’as bitui korban of this verse.
Type of Learning: Miyut of ones — a coerced oath does not create this liability.
What Is Learned: If a river or illness prevented fulfillment, or the oath was forced, the person is outside the normal shevu’as bitui korban of this verse. The verse’s language “the man by an oath” excludes the coerced.