Then he became one of those who believed, and recommended one another to perseverance and patience, and (also) recommended one another to pity and compassion.
90:18
18
أُولَٰئِكَ أَصْحَابُ الْمَيْمَنَةِ
They are those on the Right Hand (the dwellers of Paradise),
But those who disbelieved in Our Ayat (proofs, evidences, verses, lessons, signs, revelations, etc.), they are those on the Left Hand (the dwellers of Hell).
90:20
20
عَلَيْهِمْ نَارٌ مُؤْصَدَةٌ
The Fire will be shut over them (i.e. they will be enveloped by the Fire without any opening or window or outlet.