Surah Ad-Dukhan 44:10

فَٱرْتَقِبْ يَوْمَ تَأْتِى ٱلسَّمَآءُ بِدُخَانٍ مُّبِينٍ

Then watch for the Day when the sky will bring a visible smoke

Translation: Saheeh International

Tafsir

God exalted be He says So watch out for the day when the heaven will produce a visible smoke. Thus the earth became barren and famine became so severe that they began to see what looked like smoke rising between the heaven and the earth

Excerpt from Tafsir al-Jalalayn, commentary on 44:10, via Quran.com. The reader has the full commentary and 9 more tafsirs.