Reference for Chullin 281:40

טעמא דרבי יהודה משום דסבר לאו שניתק לעשה לוקין עליו

THIS IS THE GENERAL RULE: [FOR THE TRANSGRESSION OF] ANY NEGATIVE PRECEPT WHICH ADMITS OF A REMEDY BY THE SUBSEQUENT FULFILMENT OF A POSITIVE COMMAND,<span class="x" onmousemove="('comment',' Lit., 'in which there is (the command,) Rise and do'.');"><sup>29</sup></span>