Surat Al Kahf (29-30)

{وَقُلِ الْحَقُّ مِن رَّبِّكُمْ فَمَن شَاء فَلْيُؤْمِن وَمَن شَاء فَلْيَكْفُرْ إِنَّا أَعْتَدْنَا لِلظَّالِمِينَ نَاراً أَحَاطَ بِهِمْ سُرَادِقُهَا وَإِن يَسْتَغِيثُوا يُغَاثُوا بِمَاء كَالْمُهْلِ يَشْوِي الْوُجُوهَ بِئْسَ الشَّرَابُ وَسَاءتْ مُرْتَفَقاً} (الكهف: 29)

29- Tell those heedless, what was revealed to me is the truth from your lord which He willed to guide and rescue you from torment. So, whoever wills to be guided should believe and who does not is ad disbeliever and shall bear the responsibility of his choice. We have prepared for the disbelievers in Allah and His Messenger a huge fire surrounded by a wall. If they seek for help from severe thirst and torment, they shall be helped with a hot water like oil that burn the skin of their faces due to its heat, and when they draw nearer to it, the skin of their faces shall fall down. How worse is that hot water and how worse is Hell.

{إِنَّ الَّذِينَ آمَنُوا وَعَمِلُوا الصَّالِحَاتِ إِنَّا لَا نُضِيعُ أَجْرَ مَنْ أَحْسَنَ عَمَلاً} (الكهف: 30)

30- Indeed, those who believe in Allah and His Messengers, and confirmed their faith with righteous deeds, We shall not waste their reward but shall honor them and increase their reward.