Sunan an-Nasa'i Book 48, Hadith 61
"Abdullah said: 'The women who have their teeth separated..." and he quoted the Hadith.'"
"The Messenger of Allah cursed the women who do tattoos and the women who have them done, Al-Mutanammisat, and the women who have their teeth separated for the sake of beauty, those who change (the creation of Allah.)"
"I heard 'Aishah say: 'The Messenger of Allah forbade the woman who does tattoos and the woman who has that done, the woman who affixes hair extensions and the woman who has that done, An-Namisah (the one who does the plucking) and Al-Mutanammisah (the one who has it done).'"