Reference for Chullin 149:38

חלבו כחלב בהמה חדשים גרמי רבי שמעון בן לקיש אמר

Now according to my view, [says R'Johanan], it is right that the verse finds it necessary to preclude it;<span class="x" onmousemove="('comment',' Since for all purposes the fat of a nine months' living foetus is like that of an ordinary animal.');">²²</span>

Jastrow