Sunan an-Nasa'i, Book 48, Hadith 58 (In-Book) ⓘ
It was narrated from Safiyyah bint Shaibah, that 'Aishah said: "The Messenger of Allah [SAW] said: 'May Allah curse the woman who affixes hair extensions and the woman who has that done.'"
أَخْبَرَنَا مُحَمَّدُ بْنُ وَهْبٍ، قَالَ حَدَّثَنَا مِسْكِينُ بْنُ بُكَيْرٍ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ عَمْرِو بْنِ مُرَّةَ، عَنِ الْحَسَنِ بْنِ مُسْلِمٍ، عَنْ صَفِيَّةَ بِنْتِ شَيْبَةَ، عَنْ عَائِشَةَ، قَالَتْ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لَعَنَ اللَّهُ الْوَاصِلَةَ وَالْمُسْتَوْصِلَةَ " .
also referenced under: Hadith 5097 (Reference) & Volume 6, Book 48, Hadith 5100 (DarusSalam)