(7) باب التَّرَجُّلِ غِبًّا
It was narrated that 'Abdullah bin Mughaffal said:
"The Messenger of Allah [SAW] forbade combing one's hair, except every other day."
Reference: Sunan an-Nasa'i 5055
In-book reference: Book 48, Hadith 16
English translation: Vol. 6, Book 48, Hadith 5058