Tafsir of Al-Ghashiyah 88:5

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,

ليس لهم طعام إﻻ من ضريع