Al-An'am 6:70

Wathari allatheena ittakhathoodeenahum laAAiban walahwan wagharrat-humu alhayatuaddunya wathakkir bihi an tubsala nafsunbima kasabat laysa laha min dooni Allahiwaliyyun wala shafeeAAun wa-in taAAdil kulla AAadlin layu/khath minha ola-ika allatheenaobsiloo bima kasaboo lahum sharabun min hameeminwaAAathabun aleemun bima kanoo yakfuroon

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 Qur’ān], lest a soul be given up to destruction for what it earned; it will have other than Allāh 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.

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.