Sahih al-Bukhari 5940
Sahih al-Bukhari · Book 77: Dress · The lady who lengthens hair artificially
Narrated Ibn `Umar:
حَدَّثَنِي مُحَمَّدٌ ، حَدَّثَنَا عَبْدَةُ ، عَنْ عُبَيْدِ اللَّهِ ، عَنْ نَافِعٍ ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ لَعَنَ النَّبِيُّ صلى الله عليه وسلم الْوَاصِلَةَ وَالْمُسْتَوْصِلَةَ، وَالْوَاشِمَةَ وَالْمُسْتَوْشِمَةَ.
The Prophet (ﷺ) has cursed the lady who lengthens her hair artificially and the one who gets her hair lengthened, and also the lady who tattoos (herself or others) and the one who gets herself tattooed.