Law of evidence issued in Magdeburg [Germany] [Provisional]: “[…] For about money no Jew’s oath is permissible against Christian persons and no Jew may convict a Christian man about money. […]”
Magdeburg-Breslauer Systematisches Schoeffenrecht III, 2, 38. Translated by Guido Kisch, The Jews in Medieval Germany, Chicago 1949, page 262, Researched by Franziska Wagener