Sahih Bukhari Volume 7, Book 72, Hadith Number 821.

Narrated By Sa’id bin Al-Musaiyab : Mu’awiya came to Medina for the last time and delivered a sermon. He took out a tuft of hair and said, “I thought that none used to do this (i.e. use false hair) except Jews. The Prophet labelled such practice, (i.e. the use of false hair), as cheating.