The Qinaa Of Rasoolullah

Hazrat Anas bin Malik radiyallahu anhu says, "Rasoollullah sallallahu alaihe wasallam often wore a cloth on his auspicious head. This cloth, because of its greasiness, looked as if had been oiled.

حَدَّثَنَا يُوسُفُ بْنُ عِيسَى، قَالَ‏:‏ حَدَّثَنَا وَكِيعٌ، قَالَ‏:‏ حَدَّثَنَا الرَّبِيعُ بْنُ صَبِيحٍ، عَنْ يَزِيدَ بْنِ أَبَانَ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ‏:‏ كَانَ رَسُولُ اللهِ صلى الله عليه وسلم يُكْثِرُ الْقِنَاعَ، كَأَنَّ ثَوْبَهُ ثَوْبُ زَيَّاتٍ‏.‏

English reference
: Book 19, Hadith 119

Arabic reference
: Book 20, Hadith 126