قَالُوا أَوَلَمْ تَكُ تَأْتِيكُمْ رُسُلُكُم بِالْبَيِّنَاتِDid there not come to you, your Messengers with (clear) evidences?meaning, was not proof established in the world on the lips of the Messengersقَالُوا بَلَىقَالُوا فَادْعُواThey will say:"Yes."They will reply:"Then call (as you like)!..."means, you are on your own. We will not pray for you or listen to you; we do not want you to be saved and we have nothing to do with you. Moreover, we tell you that it is all the same whether you offer supplication or not, because Allah will not respond and He will not lighten the torment for you.'They will say:وَمَا دُعَاء الْكَافِرِينَ إِلاَّ فِي ضَلَلٍAnd the invocation of the disbelievers is nothing but in vain!meaning, it will not be accepted or responded to