• لَمْح

Appears 2 times in the Quran.

1. 16:77 وَلِلَّهِ غَيْبُ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ وَمَآ أَمْرُ ٱلسَّاعَةِ إِلَّا كَلَمْحِ ٱلْبَصَرِ أَوْ هُوَ أَقْرَبُ إِنَّ ٱللَّهَ عَلَىٰ كُلِّ شَىْءٍ قَدِيرٌ

   And Allah's is the unseen of the heavens and the earth; and the matter of the hour is but as the twinkling of an eye or it is higher still; surely Allah has power over all things.
   

2. 54:50 وَمَآ أَمْرُنَآ إِلَّا وَٰحِدَةٌ كَلَمْحٍۭ بِٱلْبَصَرِ

   And Our command is but one, as the twinkling of an eye.