Hadith 8:1933
Abu Bakr narrated to us, he said: Hafs narrated to us, from Hisham, from Ibn Sirin, from Anas, that he saw the Prophet, may Allah bless him and grant him peace, say to the barber: "Like this," and he gestured with his hand toward the right side.
حدثنا أبو بكر قال حدثنا حفص عن هشام عن بن سيرين عن أنس أنه رأى النبي صلى الله عليه وسلم قال للحلاق هكذا وأشار بيده إلى الجانب الأيمن