1 verse has
“تَكُنْ”
in Edition Uthmani / Al-Jaathiya (Crouching)
31:45وَأَمَّا ٱلَّذِينَ كَفَرُوٓا۟ أَفَلَمْ تَكُنْ ءَايَٰتِى تُتْلَىٰ عَلَيْكُمْ فَٱسْتَكْبَرْتُمْ وَكُنتُمْ قَوْمًۭا مُّجْرِمِينَ
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Those who spend their wealth by night and day, privately and publicly, will receive their reward from their Lord. They have nothing to fear, nor shall they grieve.
The Holy Quran · Al-Baqara (The Cow) · 2:274