Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Prophet Muhammad (peace be upon him) used to comb his hair backward, while the polytheists used to part their hair. The People of the Book also used to comb their hair backward. The Prophet (peace be upon him) liked to conform with the People of the Book in every matter about which no command had been revealed to him. After that, the Prophet (peace be upon him) started parting his hair.