Abu Huraira reported the Prophet as saying, "The hot water[1] will be poured over their heads and the hot water will penetrate till it comes inside a man. It will scour what is inside him till it comes out at his feet; and that is the melting[2]. He will then be restored as he was[3]."
Quran; 22:19
Quran; 22:20
Quran; 4:56
Tirmidhi transmitted it.