There is no harm in fastening the hair with silk or woollen threads.

Abu Dawud said: It appears that he held the view that what is prohibited is the adding of the hair of women.

Abu Dawud said: Ahmad (b. hanbal) used to say: There is no harm in tying the hair with silk or woollen threads.
Sunan Abi Dawud Book 35, Hadith 13
← Previous Hadith The woman who supplies fake hair and the one who asks for it, the woman who pulls out hair for other people and the woman who depilates herself, the woman who tattoos and the one who has it done when there is no disease to justify it have been cursed.

Abu Dawud said: Wasilah means the woman who adds false hair to the hair of women. Mustawsilah means the one who asks for adding the hair to her hair. namisah means a woman who plucks hair from the brow until she makes it thin; mutanammisah means the woman who depilates herself ; washimah is a woman who tattoos in the face with antimony or ink ; mustawshimah is a woman with whom it is done.

Sunan Abi Dawud Book 35, Hadith 12 Next Hadith → If anyone is presented some perfume, he should not return it, for it is a thing of good fragrance and light to bear.

Sunan Abi Dawud Book 35, Hadith 14