يَحْذَرُ ٱلْمُنَٰفِقُونَ أَن تُنَزَّلَ عَلَيْهِمْ سُورَةٌ تُنَبِّئُهُم بِمَا فِى قُلُوبِهِمْ ۚ قُلِ ٱسْتَهْزِءُوٓا۟ إِنَّ ٱللَّهَ مُخْرِجٌ مَّا تَحْذَرُونَ
Commentary:
The verse lifts the veil from the jokes the hypocrites used to indulge in at the cost of the Holy Prophet and the Muslims. When they sat together in private, they used to say jokingly to one another that they feared lest God should send down a Surah to the Prophet informing him of what lay concealed in their minds. They did not actually believe that the Holy Prophet might indeed receive revelation about their secret thoughts from God, because they did not believe him to be the recipient of Divine revelation. They only said this by way of ridicule, as the words that follow, i.e. Mock ye, indicate.
The words, Allah will bring to light what you fear, mean that whereas the hypocrites joked about the Holy Prophet in their secret meetings and affected to be afraid that he might be informed of those jokes by God, while in reality they entertained no such fears, the All-Knowing God would actually divulge their secrets to His Messenger and then the hypocrites would have real cause to experience their pretended apprehensions.
The Hypocrites did not actually entertain any such fear because they did not believe the Holy Prophet to be the recipient of Divine revelation. The verse alludes only to the ironical nature of their jokes and jeers.