(1) باب النَّهْىِ عَنْ كَثِيرٍ، مِنَ الإِرْفَاهِ
Narrated Abdullah ibn Mughaffal:
The Messenger of Allah (ﷺ) forbade combing the hair except every second day.
Reference: Sunan Abi Dawud 4159
In-book reference: Book 35, Hadith 1
English translation: Book 34, Hadith 4147