Those are the disbelievers truly haqqan is the verbal noun emphasising the content of what precedes it in the sentence; and We have prepared for the disbelievers a humiliating chastisement namely the chastisement of the Fire.
- 4:151151
أُولَٰئِكَ هُمُ الْكَافِرُونَ حَقًّا ۚ وَأَعْتَدْنَا لِلْكَافِرِينَ عَذَابًا مُهِينًا
Are verily the real unbelievers. And We have reserved for unbelievers an ignominious punishment.
- common.revelation-Medinan
- common.hizb : 41