4 verses have
“warn”
in Edition Clear Qur'an by Talal Itani / Yaseen (Yaseen)
36:6To warn a people whose ancestors were not warned, and so they are unaware.
36:10It is the same for them, whether you warn them, or do not warn them—they will not believe.
36:11You warn only him who follows the Message, and fears the Most Gracious inwardly. So give him good news of forgiveness, and a generous reward.
36:70That he may warn whoever is alive, and prove the Word against the faithless.
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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