[Machine] The Messenger of Allah, peace be upon him, said, "Nothing darkens the greenery nor reduces the dust more than the truthful tongue of Abu Dharr." Adh-Dhahabi remained silent about it in his summary.  

قَالَ رَسُولُ اللَّهِ ﷺ «مَا أَظَلَّتِ الْخَضْرَاءُ وَلَا أَقَلَّتِ الْغَبْرَاءُ مِنْ ذِي لَهْجَةٍ أَصْدَقَ مِنْ أَبِي ذَرٍّ» سكت عنه الذهبي في التلخيص