Yosef Karo, Shulchan Aruch — Choshen Mishpat 18
“ A congregation that chose four or five decision-makers, does not follow the principle of majority because majority is only a concept in court. If the congregation said to follow the majority, and there is a tie, we do not say to add others to resolve the issue because the congregation only selected these individuals. Rather, these decision-makers can ask others and decide accordingly based on their response.Paragraph 2- If the judges were tied, and one says I don’t know, they would add two others. ”
