In response to Abu Musa Ashari''s letter about the two arbitrators
Nahj al-Balāgha|Volume 1|Book 2|Chapter 78
وَإِنِّي لَأَعْبَدُ أَنْ يَقُولَ قَائِلٌ بِبَاطِلٍ، وَأَنْ أُفْسِدَ أَمْراً قَدْ أَصْلَحَهُ اللهُ، فَدَعْ مَا لَا تَعْرِفُ، فَإِنَّ شِرَارَ النَّاسِ طَائِرُونَ إِلَيْكَ بِأَقَاوِيلِ السُّوءِ، وَالسَّلَامُ.
I feel enraged if anyone speaks wrong, or if I should worsen a matter which Allāh has kept sound. Therefore, leave out what you do not understand, because wicked people will be conveying to you vicious things; and that is an end to the matter.