Key Verses

1. 41:11FussilatCommand
   ثُمَّ ٱسۡتَوَىٰٓ إِلَى ٱلسَّمَآءِ وَهِيَ دُخَانٞ فَقَالَ لَهَا وَلِلۡأَرۡضِ ٱئۡتِيَا طَوۡعًا أَوۡ كَرۡهٗا قَالَتَآ أَتَيۡنَا طَآئِعِينَ
   Then turned He to the heaven when it was smoke, and said unto it and unto the earth: Come both of you, willingly or loth. They said: We come, obedient.
   In context

   Then Allah (may He be glorified) resolved to create the sky at a time when it was smoke, saying to it and the earth, “Submit to My command willingly or be forced, it has to be one of the two, They said, “We come willingly; O our Lord! We have no wish except your wish.”

2. 44:10Ad-Dukhan
   فَٱرۡتَقِبۡ يَوۡمَ تَأۡتِي ٱلسَّمَآءُ بِدُخَانٖ مُّبِينٖ
   But watch thou (O Muhammad) for the day when the sky will produce visible smoke
   In context

   So O Messenger! Wait for their punishment that will come soon: a day when the sky is clearly filled with smoke.