Qur'an 72:8 · Al-Jinn

وَأَنَّا لَمَسْنَا ٱلسَّمَآءَ فَوَجَدْنَٰهَا مُلِئَتْ حَرَسًۭا شَدِيدًۭا وَشُهُبًۭا

(8) And we have sought [to reach] the heaven but found it filled with powerful guards and burning flames.