al-Zukhruf

فَذَرْهُمْ يَخُوضُوا وَيَلْعَبُوا حَتَّی يُلاقُوا يَوْمَهُمُ الَّذِي يُوعَدُونَ

83. So leave them [these idle talkers alone] to speak nonsense and play until they meet the Day which they have been promised.

God Almighty usually provides the unworthy with respite and leaves them alone for some time following sending down Guidance. When producing arguments and warnings be of no effect, the other party is supposed to be left alone in the same manner that a kind physician desperately leaves his obdurate patient alone. The blessed Verse in question is addressed to the Messenger of God (S) asking him to leave alone the ignorant people preoccupied with mundane affairs who regard the Creator of the world to natural phenomena and attribute false ascriptions to Him.

They may not be guided; therefore, leave them alone to be immersed in vanity until the Day of Resurrection arrives which has been promised to them.