1 verse has
“تَكُن”
in Edition Uthmani / Al-Hijr (The Rock)
55:15قَالُوا۟ بَشَّرْنَٰكَ بِٱلْحَقِّ فَلَا تَكُن مِّنَ ٱلْقَٰنِطِينَ
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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