Yosef Karo, Shulchan Aruch — Choshen Mishpat 17
“ Paragraph 2- If a scholar and ignoramus come to be judged, we have the scholar sit and we tell the ignoramus to sit too. If the ignoramus does not sit, we are not concerned. If a scholar comes to be judged, one may stand up for him and we are not concerned that his adversary claims will be silenced. ”
