l was sitting beneath the minbar of ʿUmar ؓ when he was addressing the people, and he said in his khutbah:I heard the Messenger of Allah ﷺ say: “What I fear the most for this ummah is every knowledgeable hypocrite with a smooth tongue.”
عَنْ أَبِي عُثْمَانَ النَّهْدِيِّ قَالَ إِنِّي لَجَالِسٌ تَحْتَ مِنْبَرِ عُمَرَ وَهُوَ يَخْطُبُ النَّاسَ فَقَالَ فِي خُطْبَتِهِ سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ إِنَّ أَخْوَفَ مَا أَخَافُ عَلَى هَذِهِ الْأُمَّةِ كُلُّ مُنَافِقٍ عَلِيمِ اللِّسَانِ