(regarding the Verse):-- 'Cruel after all that, base-born (of illegitimate birth).' (68.13) It was revealed in connection with a man from Quaraish who had a notable sign (Zanamah) similar to the notable sign which usually-hung on the neck of a sheep (to recognize it).  

رَجُلٌ مِنْ قُرَيْشٍ لَهُ زَنَمَةٌ مِثْلُ زَنَمَةِ الشَّاةِ  

I heard the Prophet ﷺ saying. "May I tell you of the people of Paradise? Every weak and poor obscure person whom the people look down upon but his oath is fulfilled by Allah when he takes an oath to do something. And may I inform you of the people of the Hell-Fire? They are all those violent, arrogant and stubborn people."  

سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ أَلاَ أُخْبِرُكُمْ بِأَهْلِ الْجَنَّةِ كُلُّ ضَعِيفٍ مُتَضَعِّفٍ لَوْ أَقْسَمَ عَلَى اللَّهِ لأَبَرَّهُ أَلاَ أُخْبِرُكُمْ بِأَهْلِ النَّارِ كُلُّ عُتُلٍّ جَوَّاظٍ مُسْتَكْبِرٍ  

I heard the Prophet ﷺ saying, "Our Lord will lay bare His Shin, and then all the Believers, men and women, will prostrate themselves before Him, but there will remain those who used to prostrate in the world for showing off and for gaining good reputation. Such people will try to prostrate (on the Day of Judgment), but their backs will be as stiff as if it is one bone (a single vertebra).  

سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ: «يَكْشِفُ رَبُّنَا عَنْ سَاقِهِ فَيَسْجُدُ لَهُ كُلُّ مُؤْمِنٍ وَمُؤْمِنَةٍ وَيَبْقَى مَنْ كَانَ يَسْجُدُ فِي الدُّنْيَا رِئَاءً وَسُمْعَةً فَيَذْهَبُ لِيَسْجُدَ فَيَعُودُ ظَهْرُهُ طَبَقًا وَاحِدًا۔»