Sunnah.com reference : Book 8, Hadith 68English translation : Book 8, Hadith 1032Arabic reference : Book 8, Hadith 1022
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 .‏‏1 ‏- صحيح .‏ رواه البخاري (5940)‏ ، ومسلم (2124)‏.‏