The Bee
وَيَوْمَ نَبْعَثُ مِن كُلِّ أُمَّةٍ شَهِيدًا ثُمَّ لَا يُؤْذَنُ لِلَّذِينَ كَفَرُوا۟ وَلَا هُمْ يُسْتَعْتَبُونَ
And [mention] the Day when We will resurrect from every nation a witness. Then it will not be permitted to the disbelievers [to apologize or make excuses], nor will they be asked to appease [Allah].
Nearby ayahs help place verse 16:84 in sequence and meaning.
فَإِن تَوَلَّوْا۟ فَإِنَّمَا عَلَيْكَ ٱلْبَلَـٰغُ ٱلْمُبِينُ
But if they turn away, [O Muhammad] - then only upon you is [responsibility for] clear notification.
يَعْرِفُونَ نِعْمَتَ ٱللَّهِ ثُمَّ يُنكِرُونَهَا وَأَكْثَرُهُمُ ٱلْكَـٰفِرُونَ
They recognize the favor of Allah; then they deny it. And most of them are disbelievers.
وَإِذَا رَءَا ٱلَّذِينَ ظَلَمُوا۟ ٱلْعَذَابَ فَلَا يُخَفَّفُ عَنْهُمْ وَلَا هُمْ يُنظَرُونَ
And when those who wronged see the punishment, it will not be lightened for them, nor will they be reprieved.
وَإِذَا رَءَا ٱلَّذِينَ أَشْرَكُوا۟ شُرَكَآءَهُمْ قَالُوا۟ رَبَّنَا هَـٰٓؤُلَآءِ شُرَكَآؤُنَا ٱلَّذِينَ كُنَّا نَدْعُوا۟ مِن دُونِكَ ۖ فَأَلْقَوْا۟ إِلَيْهِمُ ٱلْقَوْلَ إِنَّكُمْ لَكَـٰذِبُونَ
And when those who associated others with Allah see their "partners," they will say," Our Lord, these are our partners [to You] whom we used to invoke besides You." But they will throw at them the statement, "Indeed, you are liars."