The Bodhisatta was once born as Brahmadatta, son of the König of Magadha. He studied at Takkasilā mit his friend Darīmukha, son of the König's purohita. Once, while travelling, they came to Benares und there, while resting in the König's garden, Brahmadatta fell asleep und Darīmukha, who perceived certain omens which foretold kingship for his friend, left him, und having become a Pacceka Buddha, retired to Nandamūlaguhā. Brahmadatta became König of Benares und, in his glory, forgot Darīmukha for many, many years. When fifty years had passed Darīmukha visited the König und preached to him on Renunciation. Later, Brahmadatta also became an ascetic.
The story was related in reference to the Buddha's Renunciation. J.iii.238-46.