Quran 43:89 · Az-Zukhruf

In the Hereafter, on the Day of Judgement, human beings will stand in the divine court to be judged. Some will have accepted and supported the divine message conveyed to them, while others, having rejected it, will have stood in opposition to it. Whatever their condition, and knowing full well that God is omniscient, they will ask their erstwhile contemporaries to bear witness in their favour. All to no avail. The prophets and the preachers, on the other hand will be there—just as if in a court of law—to bear witness to matters of which they have first-hand knowledge, having personally observed and experienced them. It will not be their role to intercede for or condemn their fellow men. They will simply be required to present the facts. On the Day of Judgement, nobody will have any power to recommend or intervene on behalf of any guilty person in order to change the Divine Judgement which had to be made on the basis of the facts. God is too High and Great for anybody to venture to do this before Him. The task relating to the call for the Truth consists purely of giving advice and guidance. Even at the last stage, when the preacher is convinced that his hearers are going to reject his words outright, he prays to God for the people. Tolerating their torture, he remains their well-wisher.