لِيَكْفُرُوا بِمَا اتَيْنَاهُمْ فَتَمَتَّعُواSo as to be ungrateful for the graces which We have bestowed on them. Then enjoy;Then Allah warns them by saying:فَسَوْفَ تَعْلَمُونَbut you will come to know.One of them said:By Allah, if a law enforcement officer were to say this to me, I would be afraid, so how about when the One Who is issuing the warning is the One Who merely says to a thing "Be!" and it is.Then Allah denounces the idolators for fabricating lies and worshipping others instead of Him with no evidence or proof