1 verse has
“تكن”
in Edition Simple Clean / Al-Jaathiya (Crouching)
31:45وأما الذين كفروا أفلم تكن آياتي تتلى عليكم فاستكبرتم وكنتم قوما مجرمين
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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