2 verses have
“warn”
in Edition Clear Qur'an by Talal Itani / Ghafir (The Forgiver)
40:15Exalted in rank, Owner of the Throne. He conveys the Spirit, by His command, upon whomever He wills of His servants, to warn of the Day of Encounter.
40:18And warn them of the Day of Imminence, when the hearts are at the throats, choking them. The evildoers will have no intimate friend, and no intercessor to be obeyed.
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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