It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, who reports from the Noble Prophet, peace and blessings be upon him: "Indeed, hot water will certainly be poured over their heads, it will penetrate through the skull until it reaches the belly, and whatever is in the belly will be brought out, until it comes out from his feet, and this is what melting means. Then he will be returned to the way he was."