عَنْ أَبِي عُثْمَانَ النَّهْدِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ إِنِّي لَجَالِسٌ تَحْتَ مِنْبَرِ عُمَرَ وَهُوَ يَخْطُبُ النَّاسَ فَقَالَ فِي خُطْبَتِهِ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ إِنَّ أَخْوَفَ مَا أَخَافُ عَلَى هَذِهِ الْأُمَّةِ (وَفِي لَفْظٍ عَلَى أُمَّتِي) كُلُّ مُنَافِقٍ عَلِيمِ اللِّسَانِ
Abu Uthman Nahdi says: I was near the pulpit of Umar (may Allah be pleased with him), he was addressing the people. In his address, he said that the Messenger of Allah (peace and blessings be upon him) said: I fear most for my Ummah from that hypocrite who is eloquent of tongue.