Imran bin Milhan, Abu Raja' al-Atardi عمران بن ملحان أبو رجاء العطاردي · Chapters On Zuhd

"A man stood and praised one of the 'Amirs so Al-Miqdad bin Al-Aswad threw dust in his face and said: 'The Messenger of Allah (s.a.w) ordered us to throw dust in the faces of those who praise others.'"