These are nedarim of self-denial: [If] she said: “Konam, the fruits of the world to me,” he may revoke it; “[Konam] the fruits of [this] country” —- he can bring her [fruit] from another country. “[Konam] the fruits of this storekeeper to me” —- he cannot revoke it; but, if he was his only source for provisions, he can revoke it. [These are] the words of R' Yose.