Osiris is the lord of the dead, the god of resurrection, and the judge of the afterlife [S1][S2][S3][S4]. In the great myth, he was a just king of Egypt who was murdered by his jealous brother Set: Set placed him in a chest, sealed it with lead, and cast it into the Nile; the chest washed up in Byblos, and a tamarisk tree grew around it [S3][S4]. Isis found the body, restored it, and through their union conceived Horus [S3][S4]. Osiris then became lord of the Duat (the underworld), where he judges the dead: the 'Weighing of the Heart' (the heart weighed against the feather of Ma'at) determines the fate of the soul [S2][S4]. Osiris is the prototype of mummification: his restored body is the model for the mummified dead who seek resurrection [S4]. He is also associated with the annual Nile flood, which made the land fertile [S4].