And "no food except from the washing of wounds (ghislin)," meaning: the runoff from the people of Hellfire, which is pus and blood.
﴿وَلا طَعَامٌ إِلا مِنْ غِسْلِينٍ﴾ يَعْنِي: غُسَالَةُ أَهْلِ النَّارِ: القيْح والدّمُ