Sahih Muslim Book 42, Hadith Number 7143.
Chapter : It is prohibited to praise anyone so much that there may be fear of his being intoxicated because of that.
Hammam b. al-Harith reported that a person began to praise ‘Uthman and Miqdad sat upon his knee; and he was a bulky person and began to throw pebbles upon his (flatterer’s) face. Thereupon ‘Uthman said: What is the matter with you? And he said: Verily, Allah’s Messenger (may peace be upon him) said: When you see those who shower (undue) praise (upon others), throw dust upon their faces.