• أَنكَال
• تَنكِيل
• نَكَٰل

Appears 5 times in the Quran.

1. 2:66 فَجَعَلْنَٰهَا نَكَٰلًا لِّمَا بَيْنَ يَدَيْهَا وَمَا خَلْفَهَا وَمَوْعِظَةً لِّلْمُتَّقِينَ

   So We made them an example to those who witnessed it and those who came after it, and an admonition to those who guard (against evil).
   

2. 4:84 فَقَٰتِلْ فِى سَبِيلِ ٱللَّهِ لَا تُكَلَّفُ إِلَّا نَفْسَكَ وَحَرِّضِ ٱلْمُؤْمِنِينَ عَسَى ٱللَّهُ أَن يَكُفَّ بَأْسَ ٱلَّذِينَ كَفَرُوا۟ وَٱللَّهُ أَشَدُّ بَأْسًا وَأَشَدُّ تَنكِيلًا

   Fight then in Allah's way; this is not imposed on you except In relation to yourself, and rouse the believers to ardor maybe Allah will restrain the fighting of those who disbelieve and Allah is strongest in prowess and strongest to give an exemplary punishment.
   

3. 5:38 وَٱلسَّارِقُ وَٱلسَّارِقَةُ فَٱقْطَعُوٓا۟ أَيْدِيَهُمَا جَزَآءًۢ بِمَا كَسَبَا نَكَٰلًا مِّنَ ٱللَّهِ وَٱللَّهُ عَزِيزٌ حَكِيمٌ

   And (as for) the man who steals and the woman who steals, cut off their hands as a punishment for what they have earned, an exemplary punishment from Allah; and Allah is Mighty, Wise.
   

4. 73:12 إِنَّ لَدَيْنَآ أَنكَالًا وَجَحِيمًا

   Surely with Us are heavy fetters and a flaming fire,
   

5. 79:25 فَأَخَذَهُ ٱللَّهُ نَكَالَ ٱلْءَاخِرَةِ وَٱلْأُولَىٰٓ

   So Allah seized him with the punishment of the hereafter and the former life.