Talmud for Nedarim 29:12
אימא סיפא אחר הפסח בבל יחל דברו ואי דלא איתהני לפני הפסח מי איכא בל יחל אלא פשיטא דאיתהני אלמא מיתהני
We learnt: [If one says to his wife, 'Konam be] that which you benefit from me until Passover, if you go to your father's house until the Festival',<span class="x" onmousemove="('comment',' 'The Festival', without any further determinant, always refers to Tabernacles, six months after Passover. ');"><sup>12</sup></span> if she went before Passover, she may not benefit from him until Passover. Now, only if she went before Passover is she forbidden, but not otherwise?<span class="x" onmousemove="('comment',' Though the condition extends to Tabernacles, we do not fear that she may yet violate it after Passover: this refutes Rab Judah. ');"><sup>13</sup></span> — R. Abba answered: If she went before Passover, she is forbidden and is flagellated;<span class="x" onmousemove="('comment',' If she benefits from him. ');"><sup>14</sup></span> If she did not go, she is merely forbidden. Then consider the second clause: After Passover, she is subject to he shall not break his word. Now if she did not benefit before Passover, how can the injunction apply? Hence it is obvious that she did benefit, which proves that this is permitted,