3 verses have
“warn”
in Edition Clear Qur'an by Talal Itani / As-Saaffaat (Those drawn up in Ranks)
37:72Even though We sent messengers to warn them.
37:73So observe the end of those who were warned.
37:177When it descends into their yard, miserable will be the morning of those forewarned.
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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