كتاب اللباس والزينة
37  
The Book of Clothes and Adornment
(33)
Chapter: The Prohibition Adding Hair Extensions, Having Them Added, Tattooing, Being Tattooed, An-Namisah, Al-Mutanamisah, Separating Teeth, And Changing The Creation Of Allah
(33)
بَاب تَحْرِيمِ فِعْلِ الْوَاصِلَةِ وَالْمُسْتَوْصِلَةِ وَالْوَاشِمَةِ وَالْمُسْتَوْشِمَةِ وَالنَّامِصَةِ وَالْمُتَنَمِّصَةِ وَالْمُتَفَلِّجَاتِ وَالْمُغَيِّرَاتِ خَلْقِ اللَّهِ
Sahih Muslim 2122 c

Asma', daughter of Abu Bakr, reported that a woman came to Allah's Apostle (ﷺ) and said:

I have married my daughter (whose) hair of head have fallen. Her spouse likes them (the long hair). Allah's Messenger (may add false hair to her head? He forbade her to do this.
وَحَدَّثَنِي أَحْمَدُ بْنُ سَعِيدٍ الدَّارِمِيُّ، أَخْبَرَنَا حَبَّانُ، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا مَنْصُورٌ، عَنْ أُمِّهِ، عَنْ أَسْمَاءَ بِنْتِ أَبِي بَكْرٍ، أَنَّ امْرَأَةً، أَتَتِ النَّبِيَّ صلى الله عليه وسلم فَقَالَتْ إِنِّي زَوَّجْتُ ابْنَتِي فَتَمَرَّقَ شَعْرُ رَأْسِهَا وَزَوْجُهَا يَسْتَحْسِنُهَا أَفَأَصِلُ يَا رَسُولَ اللَّهِ فَنَهَاهَا ‏.‏
Reference : Sahih Muslim 2122c
In-book reference : Book 37, Hadith 177
USC-MSA web (English) reference : Book 24, Hadith 5297
  (deprecated numbering scheme)