Pope Gregory IX

"Since the eleventh hour has come in the day given to mankind...it is necessary that spiritual men [possessing] purity of life and the gift of intelligence should go forth with John [the Baptist] again to all men and all peoples of every tongue and in every kingdom to prophesy because, according to the prophet Isaias, the salvation of the remnant of Israel will not occur until, as St. Paul says, the plenitudo gentium enters first [into the kingdom of heaven]."

"The Jews, who are admitted to our acquaintance only through our mercy, should never forget their yoke of perpetual slavery, which they bear through their own fault. In the Council of Toledo it was decreed that Jews of both sexes, and for all time, should be distinguished from others by their mode of dress. We therefore command that each and every one of you to have all the excesses of the Jews completely repressed, lest they should presume to raise their necks from the yoke of servitude in contumely of the Redeemer; forbidding them to discuss in any way concerning their faith or rites with Christians. In this matter calling to your aid the help of the civil power, inflicting upon Christians, who offer opposition, due ecclesiastical punishment."