Narrated Ibn 'Umar (RA):

"The Prophet (ﷺ) cursed the woman who joins false hair to her real hair [extensions] and the one who asks for it to be done to her; and the woman who tattoos (others) and the one who has it done (for her). [Agreed upon].

وَعَنِ ابْنِ عُمَرَ ‏- رَضِيَ اَللَّهُ عَنْهُمَا‏- { أَنَّ اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-لَعَنَ اَلْوَاصِلَةَ وَالْمُسْتَوْصِلَةَ , وَالْوَاشِمَةَ وَالْمُسْتَوْشِمَةَ } مُتَّفَقٌ عَلَيْهِ [1]‏ .‏