Abu Dawud
Combing The Hair
Book Number: 028 / Hadith Number: 4178
Narated By Wa'il ibn Hujr : I came to the Prophet (pbuh) and I had long hair. When the Apostle of Allah (pbuh) saw me, he said: Evil, evil! He said: I then returned and cut them off. I then came to him in the morning. He said (to me): I did not intend to do evil to you. This is much better.