Surah Al-Jinn — Ayah 8 (72:8)
وَأَنَّا لَمَسۡنَا ٱلسَّمَآءَ فَوَجَدۡنَٰهَا مُلِئَتۡ حَرَسٗا شَدِيدٗا وَشُهُبٗا ٨
English translation (Saheeh International)
And we have sought [to reach] the heaven but found it filled with powerful guards and burning flames.
Brief commentary
And that we sought the news of the heaven and we found the sky full of stern guards, who were the angels, who guarded it from the eavesdropping that we used to do, and full of flaming fires thrown at everyone who comes close to the sky.