"They sought ways and means to win them from Catholicism and bring them back to Judaism. They instructed the Marranos in the tenets and ceremonies of the Jewish religion; held meetings in which they taught them what they must believe and observe according to the Mosaic law; and enabled them to circumcise themselves and their children. They furnished them with prayer-books; explained the fast-days; read with them the history of their people and their Law; announced to them the coming of the Passover; procured unleavened bread for them for that festival, as well as kosher meat throughout the year; encouraged them to live in conformity with the law of Moses, and persuaded them that there was no law and no truth except the Jewish religion." These were the charges brought by the government of Ferdinand II of Aragon and Isabella I of Castile against the Jews. They constituted the grounds for their expulsion and banishment in 1492, so they could not subvert "conversos". Jews who did not want to leave Spain had to accept baptism as a sign of conversion.