Maṇicūḍāvadāna

The Newari avadāna recounts the tale of Maṇicūḍa, son of King Brahmadatta of Suketu, born with a jewel in his head. As king, he ruled justly, established alms-houses, and married Padmāvati, with whom he had a son, Padmottara. During the Nigada Mahāyajña, a demon requested human blood and meat, and Maṇicūḍa sacrificed his own body. The demon revealed himself as Indra and offered worldly riches, but Maṇicūḍa wished for Buddhahood instead. Later, when King Dusprasava sought his crown jewel, Maṇicūḍa split his head open to give it away, miraculously regenerating a more magnificent jewel. The Buddha then revealed that he was Maṇicūḍa in a past life, attributing his miraculous powers to past generosity. (Mitra, p. 162-163)