According to Nagarakretagama canto 1 stanza 4 and 5 (composed by Mpu Prapanca in 1365), Hayam Wuruk was born in 1256 Saka or correspond to 1334 CE, the same year that Mount Kelud erupted. Prapanca argued that this was the divine sign that Batara Gurunata (Javanese name for Shiva Mahadewa) has manifest Himself on earth, reincarnated as the Javanese king. Also in the same, Gajah Mada declared his oath Sumpah Palapa.