those who deny the truth say of the believers if there were any good in this quran they would not have believed in it before we did. and since they refuse to be guided by it they say this is an ancient fabrication.
وقال الذين كفروا للذين آمنوا لو كان خيرا ما سبقونا إليه وإذ لم يهتدوا به فسيقولون هذا إفك قديم