Musnad Ahmad 1153:835

Yahya ibn Abi Bukayr narrated to us, he said: Ibrahim ibn Nafi’ narrated to us, from al-Hasan ibn Muslim, from Safiyyah bint Shaybah, from Aisha, that a woman from the Ansar came to the Prophet, peace and blessings of Allah be upon him, and said: "O Messenger of Allah, my daughter became ill, and the hair of her head fell out, and her husband is pressuring me. Do you see any harm if I add to her hair?" He said: "No, for He has cursed those who add hair."