Translation of the verse 6 from Surah Al-Ghashiyah : Number of verses 26 - - page 592 - Part 30.
No food will there be for them but a poisonous thorny plant,
For them there will be no food except from a poisonous, thorny plant
(88:6) They shall have no food except bitter dry thorns *3
*3) At some places in the Qur'an it has been stated that the dwellers of Hell will be given zaqqum to eat; at another place it has been said that they will have no other food but glhislin (washing from wounds), and here that "their only food will he thorny, dry grass." There is, in fact, no contradiction between these statements. This may as welt mean that Hell will have many different compartment in which different categories of the criminals will be lodged according to their crimes, and subjected to different punishments. This may also mean that if they try to avoid zaqqum they will be given ghislin, and if they try to avoid even that, they will only get thorny grass. In short, they would get nothing to suit their taste.
Source : Al-Ghashiyah Verse 6: For them there will be no food except from a poisonous, thorny plant