They will be given to drink from a boiling (Aniyah) spring.meaning, its heat has reached its maximum limit and boiling point.This was said by Ibn `Abbas, Mujahid, Al-Hasan and As-Suddi.Concerning Allah's statement,لَّيْسَ لَهُمْ طَعَامٌ إِلاَّ مِن ضَرِيعٍ