(83) باب الْوَصْلِ فِي الشَّعَرِ
Narrated Asma':
(the daughter of Abu Bakr) Allah's Messenger (ﷺ) has cursed such a lady as artificially lengthening (her or someone else's) hair or gets her hair lengthened.
Reference: Sahih al-Bukhari 5936
In-book reference: Book 77, Hadith 151
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 72, Hadith 819