It was narrated from Hisham bin 'Urwah, from his wife Fatimah, from Asma' bint Abi Bakr, that:

The Messenger of Allah ﷺ cursed the woman who affixes hair extensions and the woman who has that done.

أَخْبَرَنِي مُحَمَّدُ بْنُ إِسْمَاعِيلَ بْنِ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا أَبُو النَّضْرِ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنِ امْرَأَتِهِ، فَاطِمَةَ عَنْ أَسْمَاءَ بِنْتِ أَبِي بَكْرٍ، أَنَّ رَسُولَ اللَّهِ ﷺ لَعَنَ الْوَاصِلَةَ وَالْمُسْتَوْصِلَةَ .