• ٱعْتَرَىٰكَ
• عُرْوَة

Appears 3 times in the Quran.

1. 2:256 لَآ إِكْرَاهَ فِى ٱلدِّينِ قَد تَّبَيَّنَ ٱلرُّشْدُ مِنَ ٱلْغَىِّ فَمَن يَكْفُرْ بِٱلطَّٰغُوتِ وَيُؤْمِنۢ بِٱللَّهِ فَقَدِ ٱسْتَمْسَكَ بِٱلْعُرْوَةِ ٱلْوُثْقَىٰ لَا ٱنفِصَامَ لَهَا وَٱللَّهُ سَمِيعٌ عَلِيمٌ

   There is no compulsion in religion; truly the right way has become clearly distinct from error; therefore, whoever disbelieves in the Shaitan and believes in Allah he indeed has laid hold on the firmest handle, which shall not break off, and Allah is Hearing, Knowing.
   

2. 11:54 إِن نَّقُولُ إِلَّا ٱعْتَرَىٰكَ بَعْضُ ءَالِهَتِنَا بِسُوٓءٍ قَالَ إِنِّىٓ أُشْهِدُ ٱللَّهَ وَٱشْهَدُوٓا۟ أَنِّى بَرِىٓءٌ مِّمَّا تُشْرِكُونَ

   We cannot say aught but that some of our gods have smitten you with evil. He said: Surely I call Allah to witness, and do you bear witness too, that I am clear of what you associate (with Allah).
   

3. 31:22 وَمَن يُسْلِمْ وَجْهَهُۥٓ إِلَى ٱللَّهِ وَهُوَ مُحْسِنٌ فَقَدِ ٱسْتَمْسَكَ بِٱلْعُرْوَةِ ٱلْوُثْقَىٰ وَإِلَى ٱللَّهِ عَٰقِبَةُ ٱلْأُمُورِ

   And whoever submits himself wholly to Allah and he is the doer of good (to others), he indeed has taken hold of the firmest thing upon which one can lay hold; and Allah's is the end of affairs.