Sunan an-Nasa'i, Hadith 5249 ⓘ
It was narrated from Ibn 'Umar that: The Messenger of Allah [SAW] cursed the woman who affixes hair extensions.
أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم لَعَنَ الْوَاصِلَةَ .
also referenced under: Book 48, Hadith 210 (In-Book) & Volume 6, Book 48, Hadith 5251 (DarusSalam)