Abu Ma’mar reported that a man stood up and began to praise one of the amirs. So Miqdad ibn Aswad (RA) poured dust on his face, saying, “Allah’s Messenger (SAW) commanded us that we should pour dust on the face of those who praise.”
[Ahmed 23885, Bukhari 339, Muslim 3002, Abu Dawud 4804,Ibn e Majah3742]