Reference for Yevamot 218:9
ר"ג אומר אם מיאנה וכו': בעא מיניה רבי אלעזר מרב מאי טעמא דר"ג משום דקסבר קידושי קטנה מיתלא תלו וכי גדלה גדלי בהדה אע"ג דלא בעל
[Such a judge brings evil upon himself] for R. Samuel b. Nahmani stated in the name of R. Jonathan: A judge should always imagine himself as if [he had] a sword lying between his thighs, and Gehenna was open beneath him; as it is said in Scripture, Behold, it is the couch<span class="x" onmousemove="('comment',' E.V., litter, the seat from which he dispensed justice. ');"><sup>24</sup></span> of Solomon; threescore mighty men<span class="x" onmousemove="('comment',' Judges. ');"><sup>25</sup></span> are about it, of the mighty men of Israel etc. because of the dread in the night:<span class="x" onmousemove="('comment',' Cant. III, 7f. ');"><sup>26</sup></span>