Asma bint Abu Bakr reported,

A woman asked the Prophet ﷺ, "Messenger of Allah, my daughter has been struck with measles and her hair has fallen out. I have given her in marriage. May I attach extensions to her hair?"He replied, "Allah has cursed the woman who attaches hair extensions and the woman who has them attached."

Azami 15539

Sahih

عن أسماء قالت

سألت امرأة النبي ﷺ فقالت: يا رسول الله، إن ابنتي أصابتها الحصبة، فامرق شعرها، وإني زوجتها، أفأصل فيه؟ فقال: لعن الله الواصلة والموصولة.

الأعظمي 15539صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Clothing and adornment
Chapter
Women's clothing and adornment
Section
Prohibition of hair extensions, tattoos, and similar practices
Numbering
Jami al-Kamil 15539 (2nd edition)
Azami 15539