A city on the border of Egypt, in Nascien’s kingdom. Karrabel’s lord pretended to be a good Christian, but had actually murdered his own father.
When the lord of Karrabel rebuked a knight named Nabor, who had betrayed Nascien, God tired of his hypocritical, impious behavior and blasted him to ashes with a thunderbolt.
Source
Vulgate Estoire del Saint Graal | 1220-1235