كتاب اللباس
Read the English translation first, with the original Arabic directly underneath.
Narrated Ibn 'Umar:
That the Prophet (ﷺ) said: "Allah has cursed the woman who artificially lengthens and the woman who seeks to have her hair artificially lengthened, and the woman who tattoos and the woman who seeks tattooed." Nafi' (one of the narrators) said: "Tattooing was on the gums." [Abu 'Eisa said:] This Hadith is Hasan Sahih. He said: There are narrations on this topic from Ibn Mas'ud, 'Aishah, Asma' bint Abi Bakr, Ma'qil bin Yasar, Ibn 'Abbas, and Mu'awiyah.
لَعَنَ اللَّهُ الْوَاصِلَةَ وَالْمُسْتَوْصِلَةَ وَالْوَاشِمَةَ وَالْمُسْتَوْشِمَةَ