1 verse has
“تَكُنْ”
in Edition Uthmani / Al-Muminoon (The Believers)
105:23أَلَمْ تَكُنْ ءَايَٰتِى تُتْلَىٰ عَلَيْكُمْ فَكُنتُم بِهَا تُكَذِّبُونَ
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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