Reference for Moed Katan 33:15
אתא לבי מדרשא א"ל שלו נידוי שלך אינו נידוי
For it is taught: 'And put not a stumbling-block before the blind', that text applies<span class="x" onmousemove="('comment',' Lit., 'speaks of'.');"><sup>16</sup></span> to one who beats his grown-up son.<span class="x" onmousemove="('comment',' And this caused him to rebel.');"><sup>17</sup></span> Resh Lakish was once guarding an orchard [when] a fellow came and ate [some] figs; he shouted at him, but the fellow heeded him not, [whereupon] he said: 'Let that fellow be under a shammetha!' He replied: 'Rather be that other fellow [Resh Lakish] under a shammetha! Though I have incurred a pecuniary liability towards you, did I incur a "separation"? ' [Resh Lakish] went to the College [and reported it]; they said to him: 'His "separation" is a [justified]<span class="x" onmousemove="('comment',' An effective ban, because deserved. J.M.K. III, 1 gives another version of this incident.');"><sup>18</sup></span>