Reference for Moed Katan 29:11
מנודה מהו בשאילת שלום אמר רב יוסף ת"ש ובשאילת שלום שבין אדם לחברו כבני אדם הנזופין למקום א"ל אביי דלמא מנודה לשמים שאני דחמיר
[Therefore] just as 'shall be' stated in connection with the garment refers to something external to the body [clothes],<span class="x" onmousemove="('comment',' I.e., his clothes are to be rent exposing parts of the body as a sign of distress and mourning.');"><sup>20</sup></span> so also 'shall be' stated in connection with the head refers to something external to the body.<span class="x" onmousemove="('comment',' I.e., his head to be left bare, uncovered, by not putting on any external covering, as a sign of distress and mourning. Cf. Onkelos on Lev. XIII, 45.');"><sup>21</sup></span> What then [is to be discarded]?