Language:
كتاب اللباس
77  
Dress
(85)
Chapter: The lady who lengthens hair artificially
(85)
باب الْمَوْصُولَةِ
Sahih al-Bukhari 5942

Narrated Ibn `Umar:

I heard the Prophet (ﷺ) saying, (or the Prophet (ﷺ) said), "Allah has cursed the lady who practices tattooing and that who gets it done for herself, and also the lady who lengthens hair artificially and that who gets her hair lengthened artificially." The Prophet (ﷺ) has cursed such ladies.

حَدَّثَنِي يُوسُفُ بْنُ مُوسَى، حَدَّثَنَا الْفَضْلُ بْنُ دُكَيْنٍ، حَدَّثَنَا صَخْرُ بْنُ جُوَيْرِيَةَ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم أَوْ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏ "‏ الْوَاشِمَةُ وَالْمُوتَشِمَةُ، وَالْوَاصِلَةُ وَالْمُسْتَوْصِلَةُ ‏"‏‏.‏ يَعْنِي لَعَنَ النَّبِيُّ صلى الله عليه وسلم‏.‏
Reference : Sahih al-Bukhari 5942
In-book reference : Book 77, Hadith 157
USC-MSA web (English) reference : Vol. 7, Book 72, Hadith 825
  (deprecated numbering scheme)