Yahya related to me from Malik that Ziyad ibn Sad heard IbnShihab say, "The Messenger of Allah, may Allah bless him and grant himpeace, let his hair hang down his forehead as Allah willed, andafterwards he parted it."Malik said, "There is no harm in aman's looking at the hair of his son's wife or the hair of his wife'smother."
USC-MSA web (English) reference: Book 51, Hadith 3
Arabic reference: Book 51, Hadith 1735