فَٱرْتَقِبْ يَوْمَ تَأْتِى ٱلسَّمَآءُ بِدُخَانٍۢ مُّبِينٍۢ
Fartaqib Yawma taatis samaaa'u bidukhaanim mubeen
Saheeh International
Then watch for the Day when the sky will bring a visible smoke.