Sahih Muslim Book - 53, Hadith - 7506

وَحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى وَمُحَمَّدُ بْنُ بَشَّارٍ - وَاللَّفْظُ لاِبْنِ الْمُثَنَّى - قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ حَدَّثَنَا شُعْبَةُ عَنْ مَنْصُورٍ عَنْ إِبْرَاهِيمَ عَنْ هَمَّامِ بْنِ الْحَارِثِ أَنَّ رَجُلاً جَعَلَ يَمْدَحُ عُثْمَانَ فَعَمِدَ الْمِقْدَادُ فَجَثَا عَلَى رُكْبَتَيْهِ - وَكَانَ رَجُلاً ضَخْمًا - فَجَعَلَ يَحْثُو فِى وَجْهِهِ الْحَصْبَاءَ فَقَالَ لَهُ عُثْمَانُ مَا شَأْنُكَ فَقَالَ إِنَّ رَسُولَ اللَّهِ -صلى الله عليه وسلم- قَالَ « إِذَا رَأَيْتُمُ الْمَدَّاحِينَ فَاحْثُوا فِى وُجُوهِهِمُ التُّرَابَ ».

It was narrated from Hammam bin Al-Harith that a man started to praise 'Uthman and Al-Miqdad went and knelt down, and he was a large man, and he started to throw pebbles in his face. 'Uthman said to him: "What is the matter with you?" He said: "The Messenger of Allah (s.a.w) said: 'If you see those who praise others, throw dust in their faces."'