Nedarim

GEMARA. Rab Judah said in Rab's name: These are the words of R. Judah. But the Sages say: The vows of three maidens stand: [i] a bogereth; [ii] an orphan; and [iii] an orphan during her father's lifetime. MISHNAH. [IF SHE VOWS,] 'KONAM THAT I BENEFIT NOT FROM MY FATHER OR YOUR FATHER IF I PREPARE AUGHT FOR YOU,'  OR, 'KONAM THAT I BENEFIT NOT FROM YOU, IF I PREPARE AUGHT FOR MY FATHER OR YOUR FATHER,' HE CAN ANNUL. GEMARA. It was taught: [If she vows, 'Konam] that I benefit not from my father or your father, if I prepare aught for you,' — R. Nathan said: He cannot annul;  the Sages maintain: He can annul.  'May I be removed from Jews,  if I minister to you,' — R. Nathan said: He cannot annul: the Sages rule: He can annul. A man once vowed not to benefit from the world if he should marry before having studied halachah:  he ran with ladder and cord,  yet did not succeed in his studies. Thereupon R. Aha son of R. Huna came and led him into error,  and caused him to marry;