Sahih Bukhari
Sahih Bukhari Volume 003, Book 048, Hadith Number 831.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 48. Witnesses
Narated By Abu Musa Al-Ashari : The Prophet heard someone praising another and exaggerating in his praise. The Prophet said, "You have ruined or cut the man's back (by praising him so much).