Commentary for Chullin 277:1

בר קטלא הוא

then surely it would have been put to death! Rather we must say that it had not yet been condemned, in which case one is bound to bring it to the Beth din so as to carry into effect the verse: So shalt thou put away the evil from the midst of thee.<span class="x" onmousemove="('comment',' Ibid. XIII, 6.');">¹</span>

Rashi on Chullin