Order issued by the Council of Rome [Italy] [Provisional]: “The tenth chapter that a Christian shall not dare to join his daughter in marriage to a Jew in any way, lest she will be defiled by his sect and perish to eternity. If any Christian should dare to join his daughter in marriage to a Jew (unless he should believe in Christ entirely and be baptized), or if a Christian should dare to sell to that Jew a slave or a bondwoman, or if a Christian widow should take a Jew for her husband or those [parents] who will consent to this, they shall be anathema.”
Linder, Amnon: “The Jews in the Legal Sources of the Early Middle Ages.” Page 539