Reference for Shabbat 137:9
סד"א הואיל וחייב קרבן חידוש הוא דבכל התורה כולה לא אשכחן לאו דמייתי עליה קרבן והכא מייתי כי שגג בקרבן נמי ליחייב
Abaye said: All agree in respect to an 'oath of utterance'<span class="x" onmousemove="('comment',' E.g., 'I swear that I will eat', or, 'I swear that I will not eat', and then broken, cf. Lev. V, 4. ');"><sup>24</sup></span> that a sacrifice is not incurred on account thereof unless one is unaware of its interdict.<span class="x" onmousemove="('comment',' I.e., the offender must have forgotten his oath at the time of breaking it, so that he is unaware that his action is interdicted by his oath. A sacrifice for a broken oath is decreed in Lev. V, 4 seq. ');"><sup>25</sup></span> 'All agree': who is that? R. Johanan?<span class="x" onmousemove="('comment',' For Abaye cannot mean by 'all' that even Monabaz agrees that it is insufficient that he shall merely be ignorant that a vain oath entails a sacrifice. For how can this be maintained? On the contrary, the reverse follows a fortiori: if Monabaz regards unawareness of the liability to a sin-offering elsewhere as true unawareness, though such liability is in accordance with the general principle that where kareth is incurred for a wilful offence a sin-offering is incurred for an unwitting transgression, how much more so here, seeing that the very liability to a sacrifice is an anomaly unexpected, for the deliberate breaking of an oath does not entail kareth. Hence Abaye must refer to R. Johanan's view on the ruling of the Rabbis. ');"><sup>26</sup></span> But that is obvious! When did R. Johanan say [otherwise], where there is [the penalty of] <i>kareth</i>; but here [in the case of an 'oath of utterance'] that there is no [penalty of] <i>kareth</i>, he did not state [his ruling]? — One might argue: Since liability to a sacrifice [here] is an anomaly,<span class="x" onmousemove="('comment',' Lit., 'a new thing' — something outside the general rule. ');"><sup>27</sup></span> for we do not find in the whole Torah that for a [mere] negative injunction<span class="x" onmousemove="('comment',' Which does not entail kareth. ');"><sup>28</sup></span> one must bring a sacrifice, whilst here it is brought; hence even if he is unaware of the [liability to a] sacrifice, he is culpable:<span class="x" onmousemove="('comment',' Even on the views of the Rabbis. ');"><sup>29</sup></span>