Reference for Sanhedrin 219:14
במתניתא תנא קרח מן השרופין ומן הבלועין מן הבלועים דכתיב (במדבר כו, י) ותבלע אותם ואת קרח מן השרופין דכתיב (במדבר טז, לה) (ותצא אש מלפני ה') [ואש יצאה מאת ה'] ותאכל את חמשים ומאתים איש וקרח בהדייהו
'Of those who were swallowed up' — as it is written, … and swallowed them up together with Korah.<span class="x" onmousemove="('comment',' Ibid. 10. ');"><sup>37</sup></span> 'Of those who were burnt' — since it is written, And there came out a fire from the Lord, and consumed the two hundred and fifty men [that offered incense],<span class="x" onmousemove="('comment',' Ibid. XVI, 35. ');"><sup>38</sup></span> which includes Korah.<span class="x" onmousemove="('comment',' He includes Korah among the two hundred and fifty men who offered incense, as stated in v. 17. ');"><sup>39</sup></span>