Musnad Ahmad 27:277

Yahya narrated to us, from Ubaydullah, Nafi’ narrated to me, from Abdullah ibn Umar, who said: "The Messenger of Allah (peace and blessings of Allah be upon him) cursed the woman who adds hair extensions and the one who asks for them to be added, and the woman who does tattooing and the one who asks for it to be done."