(Al-Hajj) 22 : 57
وَالَّذِينَ كَفَرُوا وَكَذَّبُوا بِآيَاتِنَا فَأُولَٰئِكَ لَهُمْ عَذَابٌ مُهِينٌ
And those who disbelieved and rejected Our verses, for them have a heinous punishment.
The Fujjar are the true disbelievers and Lord has kept prepared heinous punishment for them as explained in verses 4: 150-151. See explanation 2: 39 and 22: 51-53.