It is narrated from Sayyiduna Abu Sa'id Khudri, may Allah be pleased with him, that the Noble Prophet, peace and blessings be upon him, said: {تَلْفَحُ وُجُوْہَہُمُ النَّارُ وَہُمْ فِیْہَا کٰلِحُوْنَ۔} … The explanation of "the fire will scorch their faces and they will be grimacing in it" is that the fire will roast them, the upper lip will shrink until it reaches the middle of the head, and the lower lip will hang down until it strikes the navel.