Sayyidah Aishah (may Allah be pleased with her) narrates that a woman of the Ansar married off her daughter, and the daughter's hair fell out due to illness. She brought her daughter to the Prophet (peace and blessings be upon him) and mentioned this to him (peace and blessings be upon him). She said: Her husband has instructed me to attach hair extensions to her hair. He (peace and blessings be upon him) said: "No, for the women who have hair extensions attached have been cursed."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسم والنشوز / 14721