The Messenger of Allah forbade giving a false impression, and the false impression of a woman when she adds extra hair to her head.
Sunan an-Nasa'i Book 48, Hadith 209
← Previous Hadith "O people, the Prophet forbade you to give false impressions. He brought a piece of black cloth and threw it in front of them and said: 'This is what women are putting on their heads and covering it.'"

Sunan an-Nasa'i Book 48, Hadith 208 Next Hadith → The Messenger of Allah cursed the woman who affixes hair extensions.

Sunan an-Nasa'i Book 48, Hadith 210