307. Ban on Shaitans entering the heavens.
These verses (15:18, 26:212, 37:8,9,10, 72:8, 72:9) of the Quran talk of the heavenly kingdom.
The angels while discussing amongst them about the commandments of Almighty, had the shaitans eavesdropping at the heavenly bode.This was not prohibited by the Almighty.
After Prophet Muhammad was chosen as the last messenger of God, the eaves dropping and secretly listening to the conversations taking place in the divine kingdom, by the shaitans were prohibited by the Almighty.
These verses tell us about the secrets of the heavenly kingdom being not known to the shaitans.