Hazrat Humayd bin Abdurrahman (Radiallahu anhu) relates form a Sahabi that Sayyidina Rasulullah (Sallallahu alaihe wasallam) combed his hair occasionally. (JA)
English reference (JA): Book 4, Hadith 35 (JA)
Arabic reference (JA): Book 4, Hadith 36 (JA)