The Prophet ﷺ said: There will be civil strife which wipe out the Arabs, and their slain will go to Hell. During it the tongue will be more severe than blows of the sword. Abu Dawud said: Al-Thawri transmitted it from Laith, from Tawus on the authority of Al-A'jam.
قَالَ رَسُولُ اللَّهِ ﷺ إِنَّهَا سَتَكُونُ فِتْنَةٌ تَسْتَنْظِفُ الْعَرَبَ قَتْلاَهَا فِي النَّارِ اللِّسَانُ فِيهَا أَشَدُّ مِنْ وَقْعِ السَّيْفِ