And the Day He will call to them, and say: "What answer gave you to the Messengers!"
The first call will be concerning the issue of Tawhid, which includes evidences of the Prophethood --
`What was your response to the Messengers who were sent to you! How did you deal with them!'
This is like the questions which will be asked of a person in his grave: `who is your Lord who is your Prophet and what is your religion!'
The believer will testify that there is no God except Allah and that Muhammad is His servant and Messenger, but the disbelievers will say, "Oh, oh, I do not know."
So he will have no answer on the Day of Resurrection except to remain silent, because whoever is blind in this world (i.e., does not see Allah's signs and believes not in Him), will be blind in the Hereafter, and more astray.
Allah says:
فَعَمِيَتْ عَلَيْهِمُ الاَْنبَاء يَوْمَيِذٍ فَهُمْ لاَ يَتَسَاءلُونَ