Musar for Sanhedrin 219:9
אמר רב חסדא כל החולק על רבו כחולק על השכינה שנאמר (במדבר כו, ט) בהצותם על ה' א"ר חמא ברבי חנינא כל העושה מריבה עם רבו כעושה עם שכינה שנאמר (במדבר כ, יג) המה מי מריבה אשר רבו בני ישראל (על) [את] ה'
R. Hisda said: Whoever contends against [the ruling of] his teacher is as though he contended against the <i>Shechinah</i>, as it says, when they strove against the Lord.<span class="x" onmousemove="('comment',' Num. XXVI, 9. The reference is to Korah's rebellion; though against Moses only, it is stigmatised as being against God. ');"><sup>23</sup></span> R. Hama son of R. Hanina said: Whoever quarrels<span class="x" onmousemove="('comment',' I.e., in general. ');"><sup>24</sup></span> with his teacher is as though he quarrelled with the <i>Shechinah</i>, as it is said, This is the water of Meribah; because the children of Israel strove with the Lord.<span class="x" onmousemove="('comment',' Ibid. XX, 13. V. n. 14. ');"><sup>25</sup></span>