That this punishment would be everlasting for disbelievers has been made clear through the third verse (37).
- 5:3737
يُرِيدُونَ أَنْ يَخْرُجُوا مِنَ النَّارِ وَمَا هُمْ بِخَارِجِينَ مِنْهَا ۖ وَلَهُمْ عَذَابٌ مُقِيمٌ
They would like to escape from the Fire, but will never succeed, and their suffering will be constant
- common.revelation-Medinan
- common.hizb : 45