Musnad Ahmad 1153:786

Husayn narrated to us, he said: Sharik narrated to us, from Hisham ibn Urwah, from his father, from Aisha, that a woman came to her and said: "My daughter is a bride who became ill, and her hair fell out. Should I add to it?" She said: "The Messenger of Allah (peace and blessings of Allah be upon him) cursed the one who adds hair extensions and the one who asks for them to be added," or she said: "The one who adds hair extensions."