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At least one biography says that Robert was accused by his ownmonks of sexual misconduct with a local woman, and that he went abroad c.1147-1148, to defend himself before Saint Bernard of Clairvaux. However, there seems little support for this story except the desire by its originator to claim he was acquitted by the great Bernard.
Legend says that he fasted so rigorously during Lent that a brother monk pleaded with him to eat. Robert agreed, and was given some buttered oatcake. But he suddenly feared to commit the sin of gluttony, and asked it be given to the poor. A beautiful stranger at the gate took the cake - and the dish. As a brother was explaining the incident, the dish suddenly appeared on the table before the abbot; the brothers decided the stranger was an angel.