al-Najm

ذَلِكَ مَبْلَغُهُم مِّنَ الْعِلْمِ إِنَّ رَبَّكَ هُوَ أعْلَمُ بِمَن ضَلَّ عَن سَبِيلِهِ وَهُوَ أعْلَمُ بِمَنِ اهْتَدَی

30. That is their utmost extent of knowledge and cognition. Indeed, your Lord it is He Who knows best those who have gone astray from His Path and He knows best those who have received Guidance.

This is the utmost extent of the knowledge and efforts of those who have forgotten God Almighty, have turned toward mundane life, and have exchanged their human dignity and honor with mundane possessions. O Prophet Muhammad (S)! God Almighty is Omniscient and knows best those who have gone astray from the Path of Truth and may not receive Guidance and He also knows best those who deserve Guidance. Your obligation solely rests in guiding all people toward the Path to Guidance so that thereby Divine Final Argument reaches everyone.