Virtues and Merits of the Prophet (pbuh) and his Companions

Bukhari :: Book 4 :: Volume 56 :: Hadith 694

Narrated Said bin Al-Musaiyab:

When Muawiya bin Abu Sufyan came to Medina for the last time, he delivered a sermon before us. He took out a tuft of hair and said, "I never thought that someone other than the Jews would do such a thing (i.e. use false hair). The Prophet named such a practice, 'Az-Zur' (i.e. falsehood)," meaning the use of false hair.