باب ما جاء في ترجل رسول الله صلى الله عليه وسلم
4  
The Combing Of The Hair Of Rasoolullah
Ash-Shama'il Al-Muhammadiyah 33
Anas ibn Malik said:
“Allah’s Messenger (Allah bless him and give him peace) made a frequent practice of oiling his head and combing his beard, and he often wore the head veil, so it was as if his robe was the robe of an oil dealer.”
حَدَّثَنَا يُوسُفُ بْنُ عِيسَى، قَالَ‏:‏ حَدَّثَنَا وَكِيعٌ، قَالَ‏:‏ حَدَّثَنَا الرَّبِيعُ بْنُ صَبِيحٍ، عَنْ يَزِيدَ بْنِ أَبَانَ هُوَ الرَّقَاشِيُّ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ‏:‏ كَانَ رَسُولُ اللهِ صلى الله عليه وسلم يُكْثِرُ دَهْنَ رَأْسِهِ وَتَسْرِيحَ لِحْيَتِهِ، وَيُكْثِرُ الْقِنَاعَ حَتَّى كَأَنَّ ثَوْبَهُ، ثَوْبُ زَيَّاتٍ‏.‏
Grade: Da'if isnad (Zubair Alizai)  إسناده ضعيف   (Zubair Alizai) حكم   :
Reference : Ash-Shama'il Al-Muhammadiyah 33
In-book reference : Book 4, Hadith 2
Explanation
comments
The clothing becomes oiled due to the use of oil, and this was against the noble habit of Sayyidina Rasulullah (Sallallahu alaihe wasallam), who liked cleanliness. He put a cloth over his head so that the amaamah (turban) etc. did not become stained.
Hadith Text
Reference