فَيَوْمَئِذٍ لَا يَنْفَعُ الَّذِينَ ظَلَمُوا مَعْذِرَتُهُمْ وَلَا هُمْ يُسْتَعْتَبُونَ ٥٧
So on that Day no excuse of theirs will avail the transgressors, nor will they be invited (then) to seek grace (by repentance).
30:58
وَلَقَدْ ضَرَبْنَا لِلنَّاسِ فِي هَٰذَا الْقُرْآنِ مِنْ كُلِّ مَثَلٍ ۚ وَلَئِنْ جِئْتَهُمْ بِآيَةٍ لَيَقُولَنَّ الَّذِينَ كَفَرُوا إِنْ أَنْتُمْ إِلَّا مُبْطِلُونَ ٥٨
verily We have propounded for men, in this Quran every kind of Parable: But if thou bring to them any Sign, the Unbelievers are sure to say, "Ye do nothing but talk vanities."
30:59
كَذَٰلِكَ يَطْبَعُ اللَّهُ عَلَىٰ قُلُوبِ الَّذِينَ لَا يَعْلَمُونَ ٥٩
Thus does Allah seal up the hearts of those who understand not.
30:60
فَاصْبِرْ إِنَّ وَعْدَ اللَّهِ حَقٌّ ۖ وَلَا يَسْتَخِفَّنَّكَ الَّذِينَ لَا يُوقِنُونَ ٦٠
So patiently persevere: for verily the promise of Allah is true: nor let those shake thy firmness, who have (themselves) no certainty of faith.