1 verse has
“sky”
in Edition Clear Qur'an by Talal Itani / Ad-Dukhaan (The Smoke)
44:10So watch out for the Day when the sky produces a visible smoke.
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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