"And a party of the People of the Scripture said, 'Believe in that which was revealed to those who have believed'"—meaning in Muhammad—"'at the beginning of the day and reject it at its end so that perhaps they will return [to disbelief]. And do not trust except those who follow your religion.'" According to the interpretation of al-Kalbi: The Jews of Khaybar wrote to the Jews of Medina, saying: Believe in Muhammad at the beginning of the day,