Al Jinn, 8 Ayah
72:8
وَأَنَّا لَمَسۡنَا ٱلسَّمَآءَ فَوَجَدۡنَٰهَا مُلِئَتۡ حَرَسٗا شَدِيدٗا وَشُهُبٗا ٨
Wa 'Annā Lamasnā As-Samā'a Fawajadnāhā Muli'at Ĥarasāan Shadīdāan Wa Shuhubāan
And we have sought [to reach] the heaven but found it filled with powerful guards and burning flames.