1 verse has
“نكن”
in Edition Simple Clean / Ghafir (The Forgiver)
74:40من دون الله ۖ قالوا ضلوا عنا بل لم نكن ندعو من قبل شيئا ۚ كذلك يضل الله الكافرين
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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