It is narrated from Sayyidah Asma' bint Abi Bakr (may Allah be pleased with her) that a woman of the Ansar came to the Prophet (peace and blessings be upon him) and said: O Messenger of Allah! We have married off a girl of ours; she fell ill and as a result the hair of her head fell out. May we attach artificial hair to it? He (peace and blessings be upon him) said: "Allah curse the woman who attaches hair extensions and the woman who has them attached."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20677