11 But while things started very favorably, as We said, and yielded rich and salutary results, promising still greater in the future, Our saint with the greatest grief of soul, saw a storm breaking over the growing harvest, which an envious spirit had provoked and desires of earthly gain had stirred up. Since Benedict was prompted by divine and not human counsel, and feared lest the envy which had been aroused mainly against himself should wrongfully recoil on his followers, "he let envy take its course, and after he had disposed of the oratories and other buildings - leaving in them a competent number of brethren with superiors - he took with him a few monks and went to another place". Trusting in God and relying on His ever present help, he went south and arrived at a fort "called Cassino situated on the side of a high mountain . . .; on this stood an old temple where Apollo was worshipped by the foolish country people, according to the custom of the ancient heathens. Around it likewise grew groves, in which even till that time the mad multitude of infidels used to offer their idolatrous sacrifices. The man of God coming to that place broke the idol, overthrew the altar, burned the groves, and of the temple of Apollo made a chapel of St. Martin. Where the profane altar had stood he built a chapel of St. John; and by continual preaching he converted many of the people thereabout".
Source: Fulgens Radiatur (Vatican.va)