Ibn Ishaq محمد بن إسحاق بن يسار‎ · Chapters on Dress

“O Sufyan bin Sahl, do not let your garment hang, for Allah does not like those who let their garments hang below the ankles.’”

“The Jews and the Christians do not dye (their hair), so differ from them.”

“I entered upon Umm Salamah and she brought out for me a hair of the Messenger of Allah (ﷺ), which was dyed with henna and Katam.”

“The People of the Book used to let their hair hang down, and the idolaters used to part their hair. The Messenger of Allah (ﷺ) liked to be more like the People of the Book. So the Messenger of Allah (ﷺ) let his forelock hang down, then after that he parted it.”