وَذَرِ الَّذِيْنَ اتَّخَذُوْا دِيْنَهُمْ لَعِبًا وَّلَهْوًا وَّغَرَّتْهُمُ الْحَيٰوةُ الدُّنْيَا وَذَكِّرْ بِهٖٓ اَنْ تُبْسَلَ نَفْسٌۢ بِمَا كَسَبَتْۖ لَيْسَ لَهَا مِنْ دُوْنِ اللّٰهِ وَلِيٌّ وَّلَا شَفِيْعٌ ۚوَاِنْ تَعْدِلْ كُلَّ عَدْلٍ لَّا يُؤْخَذْ مِنْهَاۗ اُولٰۤىِٕكَ الَّذِيْنَ اُبْسِلُوْا بِمَا كَسَبُوْا لَهُمْ شَرَابٌ مِّنْ حَمِيْمٍ وَّعَذَابٌ اَلِيْمٌ ۢبِمَا كَانُوْا يَكْفُرُوْنَ ࣖ ( الأنعام: ٧٠ )
Wa zaril lazeenat takhazoo deenahum la'ibanwwa lahwanw wa gharrat humul ha yaatud dunyaa; wa zakkir biheee an tubsala nafsum bimaa kasabat laisa lahaa min doonil laahi waliyyunw wa laa shafee'unw wa in ta'dil kulla 'adlil laa yu'khaz minhaa; ulaaa 'ikal lazeena ubsiloo bimaa kasaboo lahum sharaabum min hameeminw wa 'azaabun aleemum bimaa kaanoo yakkfuroon (al-ʾAnʿām 6:70)
And leave those who take their religion as amusement and diversion and whom the worldly life has deluded. But remind with it [i.e., the Quran], lest a soul be given up to destruction for what it earned; it will have other than Allah no protector and no intercessor. And if it should offer every compensation, it would not be taken from it [i.e., that soul]. Those are the ones who are given to destruction for what they have earned. For them will be a drink of scalding water and a painful punishment because they used to disbelieve. (Al-An'am  : 70)
1 Mufti Taqi Usmani
Avoid those who have taken their faith as fun and games. The worldly life has deceived them. Preach with it (the Qur’ān), lest one should be seized for what he did, in a way that he should have neither a helper besides Allah, nor an intercessor. Should he offer every (sort of) ransom, it will not be accepted from him. Those are the ones who are seized for what they themselves earned. For them there is a drink of boiling water, and a painful punishment, because they used to disbelieve.