The Brahmandapurana mentions an Upamanyu, who was the son of a sage called Sutapa. Upamanyu reached Kashyapa’s hermitage with a desire to marry Sumati, Kashyapa’s daughter and Garuda’s sister. No one at the hermitage was comfortable with marrying Sumati off to an old man. Upamanyu was furious and cursed that if any other brahmin married Sumati, Kashyapa’s head would burst into a hundred pieces, as per Brahmandapurana Chapter 18.