2 verses have
“لتكونن”
in Edition Simple Clean / Ash-Shu'araa (The Poets)
116:26قالوا لئن لم تنته يا نوح لتكونن من المرجومين
167:26قالوا لئن لم تنته يا لوط لتكونن من المخرجين
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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