Reference for Chullin 179:35
ורבי מחוברין דהיתירא
How [are the verses to be reconciled]? Thus if they<span class="x" onmousemove="('comment',' Sc. the nerves and bones.');"><sup>19</sup></span> are still attached [to the limb], they may be offered up; if they are severed, even if they are on the top of the altar, they must come down. And the Rabbis? - They maintain that when they are still attached [to the limb] no verse is necessary to include them, for they are on the same footing as the head of a burnt-offering;<span class="x" onmousemove="('comment',' The head of a burnt-offering had to be offered up whole upon the altar although it contains many bones; likewise every complete limb may be offered although it contains bones and nerves.');"><sup>21</sup></span> consequently the verse is only necessary to include them when severed. And Rabbi? - [He says,] as regards the permitted parts which are still attached [to the limb, I admit that]