Anas (may Allah be pleased with him) reports, "Messenger of Allah ﷺ often rubbed oil in his head and also often combed his beard. He put a cloth over his head, which became like an oil cloth due to the frequent use of oil."

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 ﷺ يُكْثِرُ دَهْنَ رَأْسِهِ وَتَسْرِيحَ لِحْيَتِهِ، وَيُكْثِرُ الْقِنَاعَ حَتَّى كَأَنَّ ثَوْبَهُ، ثَوْبُ زَيَّاتٍ.