Tafsir of Al-Humazah 104:7

And what will make you know what Al-Hutamah is? The fire of Allah, Al-Muqadah, which leaps up over the hearts. Thabit Al-Bunani said, "It will burn them all the way to their hearts while they are still alive.'' Then he said, "Indeed the torment will reach them.'' Then he cried. Muhammad bin Ka`b said, "It (the Fire) will devour every part of his body until it reaches his heart and comes to the level of his throat, then it will return to his body.'' Concerning Allah's statement,

إنها عليهم موصدة