the Prophet cursed the woman who does hair extensions and the one who has that done, and the woman who does tattoos and the one who has that done.
Sunan Ibn Majah Book 9, Hadith 143
← Previous Hadith "I was a guest (at the home) of 'Umar one night, and in the middle of the night he went and hit his wife, and I separated them. When he went to bed he said to me: 'O Ash'ath, learn from me something that I heard from the Messenger of Allah" A man should not be asked why he beats his wife, and do not go to sleep until you have prayed the Witr."' And I forgot the third thing."

Sunan Ibn Majah Book 9, Hadith 142 Next Hadith → "A woman came to the Prophet and said:, My daughter is going to get married, and she had the measles and her hair has fallen out. Can I put extensions in her hair?, The Messenger of Allah said: ‘Allah has cursed the one who does hair extensions and the one who has that done.'"

Sunan Ibn Majah Book 9, Hadith 144