Yosef Karo, Shulchan Aruch — Choshen Mishpat 30
“ Paragraph 5- If one claims that his adversary has 200 gold coins in his possession as a deposit in order to make a profit for him, and the adversary denies the whole thing, but there is one witness testifying that he heard from the guardian that he has 50 and another witness testifies that he heard from the guardian that he has 150, he has been established as a liar for that money and must pay the 200. ”
